21 Best Castle Ruins in Ireland: Abandoned Castles to Visit

Castle ruins are a testament to Ireland’s fascinating history and captivating landscapes. From Dublin to Northern Ireland, Ireland is dotted with over 30,000 ancient fortresses and medieval castle ruins that transport visitors back in time.  I am a fanatic when it comes to a castle sign when driving the back roads of Ireland, I have to find the ruin and learn its history.

Most of Ireland’s castles date from the 12th to 16th centuries and I think I may have visited around 100 or so while living in Ireland. Many are in such ruin and on private land which can make them difficult to get to but worth a hike through the fields.

Why Castle Ruins Matter More Than Intact Castles

Ireland has many well-preserved castles, but ruins tell a different story. They reveal what was lost, abandoned, or deliberately dismantled often as a result of political change rather than military defeat.

Many castles fell into ruin after the Cromwellian period, when defensive structures were rendered obsolete or intentionally destroyed to prevent reuse. Others declined during the Great Famine, when maintenance became impossible and entire regions depopulated.

What is a castle?

Generally, however, castles are fortified structures that were the private residences of lords or noblemen. They are therefore distinct from palaces that are usually not fortified and tend to be royal residences. A castle is a type of fortified structure that typically originated in Europe during the middle Ages. It is usually characterized by walls, towers, and a moat, and was used as a residence for nobility, a military stronghold, or both.

Tower Houses, Fortified Houses, and Defensive Priorities

Not all Irish castles served the same function. Many of the ruins visitors encounter are tower houses, built between the 15th and 17th centuries by Gaelic chieftains and Anglo-Norman families.

Tower houses prioritised:

• vertical defense
• limited access points
• visibility over surrounding land

They were less about comfort and more about control. Spiral staircases favoured right-handed defenders. Narrow windows limited attack angles. Height substituted for thickness in walls.

Although this article focuses on ruins, a few intact castles are worth including because they provide essential context for how Irish castles actually functioned when they were lived in, maintained, and adapted over time.

Kilkenny Castle, Birr Castle, Bunratty Castle and Cahir Castle are not ruins, but they help complete the story. Kilkenny Castle shows the evolution of a Norman stronghold into a long-term aristocratic residence; Birr Castle illustrates continuity, science, and estate life rather than military defense; and Cahir Castle, largely intact, demonstrates how formidable medieval fortifications actually worked in practice.

Are there many haunted Castles in Ireland?

Leap Castle is said to be the most haunted castle in Ireland but there are hundreds of haunted castles or at least castles with ancient tales of ghosts, banshees and troubled spirits.

Accessibility: What “Accessible” Really Means at Castle Ruins

Accessibility at castle ruins is uneven and highly site-specific. Some sites, such as the Rock of Cashel or Trim Castle grounds, have paved paths, seating, and nearby facilities. Others involve steep slopes, narrow staircases, exposed headlands, or muddy field crossings.

Wind plays a significant role. Even short walks can become tiring in exposed locations, particularly on coastal or hilltop sites.

The best 21 ruined Castles in Ireland to visit

Ireland is a land steeped in history, and its landscape is dotted with the hauntingly beautiful remains of ruined castles that must be explored. From the iconic Rock of Cashel perched atop a limestone hill in County Tipperary to the enchanting Dunluce Castle overlooking the wild Atlantic Ocean in County Antrim, each ruined castle tells a unique story of Ireland’s rich past. Here are 21 of my personal favourites you should visit when in Ireland.  

Trim Castle – County Meath

Trim Castle is the largest and one of the most impressive Norman castles in Ireland. Built in the 12th century by Hugh de Lacy, this majestic fortress stands proudly on the banks of the River Boyne. As you wander through its hallowed grounds, you’ll be transported to a time when knights roamed the land and battles were fought for power and glory.

Practical Information: Managed by: OPW; Access: grounds level paths, interior keep by ticket; Facilities: toilets/café nearby; Cost: see official page; Effort: low. Official info

Athcarne Castle – Duleek, Meath

This castle was built in Meath 1590 so it is Elizabethan in its architecture. A ruin now is supposedly haunted by the ghost of the fallen King James. He died in the nearby Battle of Boyne and reportedly stayed in the castle just prior to his death. Also heard are the agonized screams of soldiers who died at the Battle.

Practical Information: Managed by: private; Access: uneven ground, view from outside only; Facilities: none; Cost: free; Effort: moderate. Official info: Meath County Council Heritage.

Dysart Castle – County Kilkenny

Everyone has heard of Kilkenny Castle on the medieval mile but few are aware of the Dysart Castle ruins just outside Kilkenny in Thomastown.

Around 1200 was granted by George FitzRobert to Kells Priory. The priory retained possession until its suppression in 1540. The Castle itself dates roughly from the 14th Century. The building at the moment is in a perilous state and is in urgent need of restorative work.

Practical Information: Managed by: unmanaged/private; Access: view from surrounding land only; Facilities: none; Cost: free; Effort: low. Local info: Kilkenny Heritage.

Dunamase Castle – County Laois

The Rock of Dunamase Ireland is the seat of the ancient Kings of Laois in Ireland’s Ancient East. The Rock of Dunamase is the spectacular hill that the Castle of Dunamase sits atop and overlooks the Valley of the O’Moores.

Dunamase began as an early Christian dun (fort) known as Dún Másc, meaning the ‘Fort of Masc’. The earliest references to the Rock of Dunamase appear in the Annals of the Four Masters which states that the Castle was plundered by Vikings in 843 AD. When the Normans arrived in Ireland during the 12th century the rock was refortified with the great hall and the earlier gate tower surviving from this period.

Practical Information: Managed by: OPW (unguided site); Access: uphill limestone paths; Facilities: none; Cost: free; Effort: moderate. Official info.

McDermott’s Castle – Castle Island, County Roscommon

Nestled among the numerous small islands that grace the picturesque woodlands of Lough Key, McDermott’s Castle Island emerges as a timeless testament to history. This fairy tale castle, repeatedly razed, restored, and abandoned, boasts a tumultuous past.

Practical Information: Managed by: within Lough Key Forest & Activity Park; Access: view by boat tour or from shore; Facilities: park amenities nearby; Cost: park/boat fees apply; Effort: low. Official info, Boat tours: https://www.loughkeyboats.com/boat-tours/.

Leap Castle – County Offaly

Leap Castle is world-renowned as the most haunted castle in Ireland if not the world. Its dark halls and history contain many secrets and tragedies. Leap Castle is privately owned by Irish musician, Sean Ryan, who has been restoring the property since he bought it in the early 1990s. Said to be haunted by a sadistic chieftain, the original 16th century fortress is mostly ruins.

The “Bloody Chapel” tale at Leap is allegedly where a murder between a Priest and his brother took place during high mass is just one tale.  The oubliette is home to many secrets of a dark and terrifying past.  In 1922 workmen at Leap Castle found the oubliette in a secret dungeon hidden behind a wall in a corner of the Bloody Chapel.  When they explored the dark hole further they made a horrific discovery – there were enough human skeletons amassed on top of wooden spikes that it would take three cartloads to remove them for a Christian burial.

Practical Information: Managed by: private (by appointment); Access: limited guided visits; Facilities: none; Cost: check current; Effort: moderate (stairs/uneven). Official info.

Rock of Cashel – County Tipperary

The Rock of Cashel (also known as St. Patrick’s Rock) rises out of the landscape as you approach it placed high on top of limestone outcrops where it oversees the fertile landscape of Tipperary.  As an early monastic site the Rock of Cashel’s stonewalls circle a round tower, a 13th-century Gothic cathedral and an exceptional 12th-century Romanesque chapel containing some of Ireland’s oldest. One of Ireland’s stunning archaeological sites, The Hill of the Rock is located on is banded with limestone outcrops rising up to the green mound that the Rock sits on.

Practical Information: Managed by: OPW; Access: paved paths, ticketed; Facilities: visitor centre, café; Cost: see official page; Effort: low. Official info.

Roscrea Castle – County Tipperary

In the heart of Roscrea in County Tipperary, one of the oldest towns in Ireland, you will find a magnificent stone motte castle dating from the 1280s. It was used as a barracks from 1798, housing 350 soldiers, and later served as a school, a library and even a sanatorium.

Practical Information: Managed by: OPW; Access: level urban site; Facilities: visitor amenities nearby; Cost: see official page; Effort: minimal. Official info.

Lisronagh Castle – Tipperary

Lisronagh has been inhabited since at least the medieval period and was held by the Anglo-Norman de Burgh family from the time of Henry II. The powerful Butler family built a tower house in the village in the 16th century, which is now a ruin.

Practical Information: Managed by: private/unmanaged; Access: external viewing only; Facilities: none; Cost: free; Effort: moderate. Local info: Tipperary Heritage.

Rockstown Castle – County Limerick

Rockstown Castle, which was built around the 15th Century, sits on top of a hill with a base of solid rock. There are breathtaking views of the countryside and you can head up the stairway to the top. It is one of the most amazing Castles I’ve been to. Most rooms are accessible and the stairway leads you all the way to the very top, which is all covered by ivy and flowers.

Practical Information: Managed by: unmanaged; Access: internal stairs but uneven/unsafe surfaces; Facilities: none; Cost: free; Effort: moderate. Local info: Limerick Heritage.

Blarney Castle – County Cork

Probably one of Ireland’s most famous landmarks the legend of the Blarney Stone is one that many tourists pilgrimage to. Not my idea of fun as you have to hike up many narrow and worn stairs and then take care that someone has a good grip on you as you bend over backwards to kiss the stone. But it does seem to be high on many a bucket list.

Practical Information: Managed by: private; Access: extensive grounds, tower by steep stairs; Facilities: full amenities; Cost: see official page; Effort: high for upper levels. Official info.

Ballinskellig Castle – Ring of Kerry

The Ballinskelligs Castle ruin was a stronghold of the McCarthy’s who tribal chiefs were back in the 16th century and legend holds that it was constructed to defend the bay from pirates. It is prominently located and it is in a relatively good state of preservation. Take a moment to visit the Ring Fort at Staigue when touring the Ring of Kerry and visiting County Kerry.

Practical Information: Managed by: unmanaged; Access: uneven coastal paths; Facilities: none; Cost: free; Effort: moderate; Exposure: high wind. Official info.

Ballycarbey Castle – Ring of Kerry

Just outside Caherciveen on the Ring of Kerry you can visit Ballycarbery Castle which sadly is inaccessible but you can get some great photos from a distance. Situated near the water’s edge you will see the remains of the castle with its ivy-covered tower house which was once home to the McCarthy Clan and built sometime in the 15th century.

Practical Information: Managed by: unmanaged; Access: view from a distance only; Facilities: none; Cost: free; Effort: low. Official info.

Rockfleet Castle – County Mayo

Rockfleet is a tower house that was built in the mid-16th century near Westport. It was home to Pirate Queen Grace O’Malley and her husband Richard Burke ‘Richard of Iron’ from 1566. O’Malley is believed to have died here. The castle was restored in the 1950s and is open to the public in the summer season.

Practical Information: Managed by: OPW (unguided site); Access: exterior viewing common; Facilities: none; Cost: free; Effort: moderate. Official info.

Clifden Castle – Connemara Galway

Clifden Castle in Connemara was built in the 19th Century but went into decline during the Great Famine of 1845. The castle is said to be haunted by the spirits of the poor and deprived who sheltered in the castle grounds during this period.

Practical Information: Managed by: unmanaged; Access: rough walking paths; Facilities: none; Cost: free; Effort: moderate; Exposure: wind. Local info.

Donegal Castle – County Donegal

Donegal Castle is a powerful symbol of both Gaelic chieftaincy and later English influence. Originally a 15th-century tower house of the O’Donnell clan, the ruling family of Tyrconnell, it was transformed in the early 1600s by Sir Basil Brooke with the addition of a magnificent Jacobean manor house wing. This unique fusion of rugged medieval fortification and elegant Renaissance domesticity, meticulously restored in the 1990s, chronicles the dramatic shift in power and culture during the Plantation of Ulster.

Practical Information: Managed by: OPW; Access: town site, lower floors level; Facilities: visitor centre; Cost: see official page; Effort: moderate for upper levels. Official info.

Doe Castle – Sheephaven Bay, Donegal

Doe Castle in Sheephaven Bay is a quintessential 15th-century Gaelic tower house, built by the MacSweeney clan. Its formidable position on a small peninsula surrounded on three sides by water, protected by a rock-cut moat on the landward side, makes it one of the country’s most perfectly situated castles.

Practical Information: Managed by: OPW/Donegal County Council; Access: short, uneven approach; Facilities: none; Cost: free; Effort: moderate; Exposure: coastal wind. Official info.

Kildamhnait Castle – Achill Island

Kildamhnait Castle, on the southeast coast of Achill Island, is a 15th-century tower house associated with the O’Malley Clan (Grace the Pirate Queen’s family), there is also a 16th-century church, graveyard and holy well you can visit.

Practical Information: Managed by: unmanaged; Access: short uneven walk beside church ruins; Facilities: none; Cost: free; Effort: moderate. Local info: Mayo Heritage.

Northern Ireland Castles

Castle Roche – Armagh Northern Ireland, United Kingdom

Castle Roche, which appears to be based upon Beeston Castle in Wales, served as a vital strategic stronghold on the frontier between Ulster and the Pale, controlling the pass into what is now South Armagh. It’s on private property but can be reached via a country lane off either the N1 or N53. The Castle is believed to have been built in 1236 by Lady Rohesia de Verdun after the death of her husband. The story goes that she promised her hand in marriage to the architect who would build her a castle at Roche. When he went to claim her hand, she had him thrown from one of the windows, which to this day is known as the ‘murder window’.

Practical Information: Managed by: unmanaged/private land; Access: uneven hill paths; Facilities: none; Cost: free; Effort: high in poor weather. Local info: Louth Heritage.

Dunluce Castle – County Antrim

Perched dramatically on a cliff edge overlooking the wild Atlantic Ocean, on the Causeway Coastal route Dunluce Castle is a striking sight to behold. This medieval ruin dates back to the 13th century and was the seat of the powerful MacDonnell clan.

The MacDonald family abandoned the castle in 1690 at the time of the battle of the Boyne. Today, Dunluce Castle still belongs to the MacDonald’s; however, it is managed by the Northern Irish Environment Agency.

Practical Information: Managed by: Historic Environment Division (NI); Access: maintained cliff‑edge paths; Facilities: visitor centre; Cost: see official page; Effort: moderate due to exposure. Official info.

Kinbane Castle – County Antrim

Not much of the castle remains, and the path up to it is narrow and stepped with over 140 steps to traverse. Kinbane Castle is a State Care Historic Monument sited in the town land of Cregganboy, in Causeway Coast and Glens Borough Council area. The area surrounding Kinbane Castle is a Scheduled Historic Monument; it also offers spectacular views of Rathlin Island and Dunagregor Iron Age fort.

Practical Information: Managed by: Historic Environment Division (NI); Access: 140+ steep steps; Facilities: none; Cost: free; Effort: high; Exposure: coastal wind; may close in bad weather. Official info.

When Ruins Are Inaccessible, and Why That’s Still Enough

Some of Ireland’s most striking ruins, including Ballycarbery, are inaccessible for safety or conservation reasons. This can frustrate visitors, but distance is not always a limitation.

Photographing, observing, and understanding a castle’s placement often reveals more than interior access. Position relative to water, farmland, or trade routes explains why the site mattered.

In many cases, restriction protects what remains. Accepting this reframes the visit as observation rather than exploration.

Castle Ruins and Slow Travel

Castle ruins suit slow travel particularly well. They are not time-bound, rarely crowded, and often encountered incidentally while moving through rural landscapes.

Stopping for one ruin, then allowing space for conversation, rest, or a meal nearby often creates a fuller experience than chasing multiple sites.

This is especially true for older travellers or those managing energy carefully. Ruins do not require completion. They reward presence.

Common Mistakes Visitors Make at Castle Ruins

·        Assuming ruins are “quick stops”

·        Wearing smooth-soled shoes on limestone

·        Visiting multiple exposed sites back-to-back

·        Expecting cafés or toilets nearby

·        Treating ruins as attractions rather than landscapes

Exploring Castle Ruins in Ireland: The Ultimate Road Trip

If you’re a true castle enthusiast, embarking on a road trip to explore castle ruins across Ireland is an adventure you won’t want to miss. The island’s diverse landscapes, from rugged coastlines to rolling green hills, provide the perfect backdrop for discovering these ancient treasures. Consider a visit to Bunratty Castle in County Clare, or perhaps you want to stay in a luxury Castle hotel such as Ashford Castle.  Each of these castles offers a different glimpse into Ireland’s storied past and is sure to leave you breathless.

From the haunting beauty of Dunluce Castle to the majestic grandeur of the Rock of Cashel, visiting Ireland’s castle ruins gives you a chance to journey into Ireland’s rich history and architectural legacy.  

Who Castle Ruins in Ireland Are Best For

Castle ruins suit travellers who:

• enjoy interpreting landscapes
• accept uneven ground and weather variability
• value historical context over restoration
• are comfortable with partial access

Ireland’s ruined castles do not explain themselves. They remain, and invite visitors to meet them on their own terms.

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