Sketrick Castle, Medieval tower house in Strangford Lough, Northern Ireland
Sketrick Castle is a rectangular stone structure on Sketrick Island in Strangford Lough. The remaining north and east walls still stand, along with underground passages and a chamber that housed a fresh water source.
The castle first appeared in records in 1470 when an O'Neill army captured it and handed it to MacQuillan for safekeeping. This occurred during the regional conflicts that shaped the area at that time.
The fortress displays medieval features such as a boat bay and stone passages that show how coastal defense was organized. Visitors can observe these architectural details today and understand how the structure connected with the water for protection and access.
The site is free to access throughout the year, allowing visitors to explore the remaining walls and underground areas at their own pace. Those who visit should be prepared for water and uneven ground on the island.
Beneath the structure lies an underground passage discovered in 1957 that leads to a fresh water spring under a vaulted ceiling. This hidden space reveals how crucial drinking water was to those living here.
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