Ireland, with its lush green hills, misty coastlines, and ancient landscapes, is a land steeped in myth, magic, and history. At the heart of that history lie its castles—rugged, romantic, and often perched dramatically on cliffs or hidden in quiet valleys. Some are crumbling ruins haunted by legends, while others are lovingly preserved or restored, offering visitors a chance to walk in the footsteps of kings, knights, and rebels.

In this article, we’ll explore the top 10 old castles to visit in Ireland, blending history, travel advice, and a little local lore to inspire your next journey across the Emerald Isle.

1. Kilkenny Castle – County Kilkenny

History:
One of Ireland’s most iconic castles, Kilkenny Castle was originally built in 1195 by the powerful Norman invader Richard de Clare, better known as Strongbow. It was later rebuilt in stone by the Butler family, who held it for nearly 600 years. The castle was central in many key Irish historical events, including the Confederate Wars in the 17th century.

Why Visit:
Restored to its former grandeur, Kilkenny Castle is now a cultural hub. Wander through its lavish Victorian rooms, explore its Long Gallery with its painted ceiling, and enjoy art exhibitions and parklands. The grounds are perfect for picnics and long walks.

Tip:
Visit midweek to avoid crowds, and take time to stroll the Medieval Mile in Kilkenny city.

2. Bunratty Castle – County Clare

History:
Bunratty Castle, constructed in 1425, is the most complete and authentically restored medieval fortress in Ireland. Built on a site previously used by Vikings and Normans, the current structure was the stronghold of the MacNamara and later the O’Brien clans.

Why Visit:
Its real draw lies in the Bunratty Folk Park, a reconstructed 19th-century village that surrounds the castle. Inside the fortress, guides in costume bring history to life, and you can even attend a medieval banquet in the Great Hall—complete with mead and live harp music.

Tip:
Book tickets for the medieval banquet in advance—it's a feast for all senses and usually sells out.

3. Rock of Cashel – County Tipperary

History:
More than just a castle, the Rock of Cashel is a magnificent collection of medieval buildings set on a limestone outcrop. It was once the seat of the Kings of Munster and later gifted to the Church. Saint Patrick is said to have converted King Aengus to Christianity here in the 5th century.

Why Visit:
The Rock features a round tower, Romanesque chapel, Gothic cathedral, and a High Cross—all backdropped by stunning views over the Golden Vale. It's also steeped in legends that add a mystical air to the place.

Tip:
Arrive early in the morning or late afternoon for the best light and fewer visitors. Bring a jacket—it can be windy up there!

4. Dunluce Castle – County Antrim

History:
Clinging to a cliff edge along the Causeway Coast, Dunluce Castle is one of the most dramatic castle ruins in Ireland. Built in the 13th century by Richard Óg de Burgh and later owned by the MacDonnell clan, it was partially abandoned after part of the kitchen collapsed into the sea in 1639.

Why Visit:
The views alone are worth the trip. You can wander through the ruins, imagining life during sieges and storms. The castle inspired C.S. Lewis’ Cair Paravel in The Chronicles of Narnia.

Tip:
Pair your visit with a trip to the nearby Giant’s Causeway. Sunset over Dunluce is unforgettable.

5. Cahir Castle – County Tipperary

History:
One of the largest and best-preserved castles in Ireland, Cahir Castle was built in the 13th century on a rocky island in the River Suir. It was a stronghold of the Butler family and withstood many sieges, including during the Irish Confederate Wars.

Why Visit:
Its towers, keep, and defensive walls are remarkably intact. Explore the ancient spiral staircases, view the multimedia exhibits, and admire the siege weapons on display.

Tip:
Cahir is less touristy than other castles, making for a more relaxed visit. The nearby Swiss Cottage is also worth a look.

6. Ashford Castle – County Mayo

History:
Originally a 13th-century Anglo-Norman castle, Ashford was expanded into a Victorian Gothic manor in the 1800s by the Guinness family. It has hosted everyone from royalty to Hollywood stars and is now one of Ireland’s most luxurious hotels.

Why Visit:
Stay in pure opulence—or at least stroll the grounds. You can enjoy falconry, boating, archery, or high tea. The setting on the shores of Lough Corrib is utterly serene.

Tip:
Even if you can’t afford to stay overnight, book a day experience or spa treatment to soak in the ambiance.

7. Ross Castle – County Kerry

History:
Built in the late 15th century by the O'Donoghue clan, Ross Castle stands beside the lakes of Killarney. It was one of the last strongholds to fall to Cromwellian forces in the 1650s and is now restored and furnished in the style of its time.

Why Visit:
Take a guided tour through the tower house, then enjoy a boat trip across Lough Leane to explore Innisfallen Island. The scenery is jaw-droppingly beautiful.

Tip:
Bring binoculars for birdwatching, and consider hiring a jarvey (horse-drawn carriage) for a classic Killarney experience.

8. Trim Castle – County Meath

History:
Trim Castle is Ireland’s largest Anglo-Norman castle, built by Hugh de Lacy in the 12th century. It was a key center for Norman power and saw centuries of political and military action. Its star turn came in 1995 when it appeared in Braveheart.

Why Visit:
Climb the massive keep for panoramic views of the Boyne Valley. The guided tour offers fascinating insights into medieval architecture and daily life.

Tip:
Combine your visit with the Hill of Tara and Newgrange nearby for a full day of ancient wonders.

9. Dunguaire Castle – County Galway

History:
Built in 1520 by the O'Hynes clan, Dunguaire Castle sits on the shore of Galway Bay near Kinvara. It later became a gathering place for Irish literary figures in the 20th century, including W.B. Yeats and George Bernard Shaw.

Why Visit:
This picturesque tower house is often photographed for calendars and postcards. It’s open for tours and seasonal medieval banquets with poetry, music, and storytelling.

Tip:
Come in the early evening and watch the light shift across the bay—it’s pure poetry.

10. Carrickfergus Castle – County Antrim

History:
Built in 1177 by the Norman knight John de Courcy, Carrickfergus Castle guarded Belfast Lough and was key in medieval and colonial times. It withstood sieges from the Scots, Irish, English, and even the French.

Why Visit:
It’s among the most complete Norman castles in Ireland, with thick stone walls, a mighty keep, and a long maritime history. The town of Carrickfergus also has a quaint charm.

Tip:
Explore the harbor and promenade after visiting the castle—great for photos and a fish-and-chips stop.

Honourable Mentions

While the top ten are incredible, there are dozens more worth exploring. Don’t miss:

• Leap Castle (Offaly): Ireland’s most haunted castle.
• Doe Castle (Donegal): Dramatic coastal tower house.
• Birr Castle (Offaly): Home to one of the world’s oldest telescopes.
• Blarney Castle (Cork): Kiss the famous Blarney Stone.
• Ardgillan Castle (Dublin): Gorgeous gardens and sea views.

Castle-Hopping Tips for Ireland

• Rent a car to get off the beaten track and explore more remote ruins.
• Many castles are seasonal, so check opening times before you go.
• Wear good footwear—medieval staircases and grassy ruins can be slippery.
• Join a guided tour where available for deeper insight.
• If you're a history buff, get an OPW Heritage Card for free entry to many state-run sites.

Final Thoughts

Ireland’s castles are not just stone and mortar—they are time machines, portals into centuries of conflict, culture, and romance. Whether you prefer the windswept ruins of Dunluce or the regal luxury of Ashford, each castle offers a unique experience and a chance to connect with Ireland’s vibrant past.

So pack your rain jacket, bring a sense of adventure, and go castle-hopping across one of the most enchanting landscapes in the world. From turret to tower, Ireland’s old castles are waiting.