Best attractions and places to see around Horse Island include a collection of historical sites, ancient ruins, and religious monuments. The area features several castles and monastic sites, offering insights into centuries of local history. Visitors can explore structures dating back to the 6th century, including fortified houses and early Christian stone carvings. The landscape around these attractions often incorporates forests and scenic points.
Last updated: July 7, 2026
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In the graveyard are several interesting stones, probably the most noted one is known as the Bishops stone, this odd shaped stone has been altered and reused several times, originally thought to have been a carved figure similar to those on nearby White Island. Another stone with a lot of history is the large slab standing west of the bishops stone, one side of the stone bears at least twelve cup-shaped hollows, see image above right, which suggest this maybe a multiple bullaun stone/cup marked stone that has been reused as an early Christian cross slab, as on the obverse face is a Greek cross in a circle with a bifurcated stem. Situated south of the bullaun stone is a holed stone, as the image shows this stone is half embedded in the ground. Immediately to the West of the holed stone is a broken 1.2 metre high stone pillar. This stone may have been damaged. http://www.megalithicireland.com/Killadeas.htm
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Devenish Monastic Site is generally considered to be the most important of Lough Erne's many island church settlements. Devenish was founded in the 6th century by St Molaise. It was raided by Vikings in 837 and burned in 1157, but in the Middle Ages flourished as the site of a parish church and St Mary's Augustinian Priory. There are extensive low earthworks on the hillside, but the earliest buildings are St Molaise's House (a very small church) and the fine round tower close by, both with striking Romanesque decorations from the 12th century. Teampull Mรณr, the lower church, dates from the early 13th century and has a beautifully moulded south window. It was extended to the east in about 1300, while later additions include a residential wing to the north and the Maguire Chapel to the south, with 17th century heraldic slabs. St Mary's Augustinian Priory on the hilltop dates from the middle 15th and early 16th centuries, with church, tower and small north cloister. In its graveyard stands an unusual, intricately-carved cross of the middle 15th century. - https://en.wikipedia.org/wiki/Devenish_Island - https://web.archive.org/web/20120224043140/http://www.culturenorthernireland.org/article.aspx?art_id=746
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In the graveyard are several interesting stones, probably the most noted one is known as the Bishops stone, this odd shaped stone has been altered and reused several times, originally thought to have been a carved figure similar to those on nearby White Island. Another stone with a lot of history is the large slab standing west of the bishops stone, one side of the stone bears at least twelve cup-shaped hollows, see image above right, which suggest this maybe a multiple bullaun stone/cup marked stone that has been reused as an early Christian cross slab, as on the obverse face is a Greek cross in a circle with a bifurcated stem. Situated south of the bullaun stone is a holed stone, as the image shows this stone is half embedded in the ground. Immediately to the West of the holed stone is a broken 1.2 metre high stone pillar. This stone may have been damaged. http://www.megalithicireland.com/Killadeas.htm
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During WW2 Castle Archdale was a major base for flying boats and housed up to 2,500 people. Buildings such as these would have been a central location for the RAF fighters who lived here. Sometimes exhibitions are held in these courtyards to display some of the key historical notes of the use of this area during the war.
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Old Castle Archdale is situated on Castle Hill within a 520 hectare coniferous and mixed broadleaved forest. The castle was built in the 1600s and was the main castle on this former estate before its successor took it's place in the 1800s, Castle Archdale.
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Old Castle Archdale sits on a forest clifftop. It is named 'old' to distinguish it from its successor, the 18th century Castle Archdale. The castle was built by an Englishman from Suffolk who had been granted the estate in 1612 after paying 5 pounds, 6 shillings and 8 pence for the 1000 acres of land. During the Irish Rebellion of 1641 the castle was captured by Rory Maguire as part of the uprising to retake his lands that had been lost in 1607. The heir to the castle was saved by his nurse however the other children were killed. After the castle was returned to the family it was repaired and lived in until 1689. The castle saw its end during the Williamite Wars when the castle was burnt out and abandoned.
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This fortified house is on Tully Point and built for Sir John Hume who occupied the house until 1641 when it was attacked by John Maguire and burned on Christmas Eve with all its inhabitants massacred. After that it was not lived in again. There is a visitors centre in a restored farmhouse that has an interesting exhibition telling a number of stories relating to the castle. To visit the castle be sure to step off the bike as it is on foot only!
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Perched atop a cliff and surrounded by thick forest, it's easy to imagine how life would have been hundreds of years ago as you wander the crumbling walls of Old Castle Archdale. Built in 1615 by Englishman John Archdale, the castle was captured by the Irish in the Irish Rebellion of 1641. The castle was inhabited until 1689, when it was destroyed by fire and abandoned.
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The area around Horse Island is rich in history. You can visit Old Castle Archdale, a 17th-century castle set within a large forest, or the ruins of Tully Castle, a fortified house with a visitor's center. Another significant site is the Devenish Monastic Site, founded in the 6th century, featuring ancient churches and a round tower.
Yes, there are several notable castles. Old Castle Archdale, built in the 1600s, is situated on a forest clifftop. You can also explore the Tully Castle Ruins, a fortified house that was attacked and burned in 1641. Additionally, the Castle Archdale Courtyard Buildings offer insight into the area's history, including its role during WWII.
The region features several ancient religious sites. The Killadeas Priory Church and Early Christian Stones include a graveyard with notable stones like the Bishops stone and a large slab with cup-shaped hollows. The Devenish Monastic Site, founded in the 6th century by St Molaise, boasts a fine round tower and several ancient church structures.
Yes, several attractions are suitable for families. Tully Castle Ruins offers a visitorโs center with exhibitions that tell local stories. The Castle Archdale Courtyard Buildings also provide an engaging historical experience for all ages, sometimes hosting exhibitions about the area's past.
The attractions around Horse Island are often set within beautiful natural surroundings. For instance, Old Castle Archdale is located on a clifftop within a 520-hectare coniferous and mixed broadleaved forest, offering scenic views and opportunities for exploration.
The area offers various outdoor activities. You can find numerous routes for jogging, road cycling, and general cycling. For running, explore trails like the 'Old Castle Archdale โ Rossmore Point Beacon loop'. Cyclists can enjoy routes such as the 'Boa Island and Pettigo loop' or the 'Kingfisher Cycle Trail - Northern Loop'. You can find more details on these activities in the Running Trails around Horse Island, Road Cycling Routes around Horse Island, and Cycling around Horse Island guides.
While specific hiking trails are not detailed for all attractions, the forest setting of Old Castle Archdale suggests opportunities for walking and exploring its grounds. For more structured outdoor routes, consider the jogging and cycling guides available for the region, which often include paths suitable for walking.
Visitors appreciate the rich historical context and the scenic settings of the attractions. The crumbling walls of Old Castle Archdale, perched on a clifftop, allow visitors to imagine life centuries ago. The historical narratives at Tully Castle Ruins and the ancient stones at Killadeas Priory Church are also highly regarded for their historical significance and unique features.
The castles around Horse Island played significant roles in local history. Old Castle Archdale was built in the 1600s and was involved in the Irish Rebellion of 1641 and the Williamite Wars. Tully Castle Ruins, built for Sir John Hume, was famously attacked and burned on Christmas Eve in 1641, marking a tragic event in its history.
Absolutely. The visitorโs center at Tully Castle Ruins, housed in a restored farmhouse, features an exhibition dedicated to local stories related to the castle. Similarly, the Castle Archdale Courtyard Buildings sometimes host exhibitions detailing the area's historical notes, including its use during WWII.
Yes, Killadeas Priory Church and Early Christian Stones is particularly notable for its unique stone monuments. The graveyard contains the 'Bishops stone' and a large slab with at least twelve cup-shaped hollows, suggesting its reuse as an early Christian cross slab. The Devenish Monastic Site also features an unusual, intricately-carved cross from the mid-15th century.
The Devenish Monastic Site is generally considered the most important of Lough Erne's island church settlements. It's best explored on foot to appreciate its extensive low earthworks, St Molaise's House, the fine round tower, Teampull Mรณr (the lower church), and St Mary's Augustinian Priory, all dating from various periods between the 6th and 16th centuries.


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