If you love to explore historical sites then you might enjoy visiting Castlederg Castle in Strabane County Tyrone.
This castle ruin is located on the River Derg, and excavations revealed a 15th century tower house on the site before the castle! The ruins consist of a rectangular bawn with square flankers at each corner.
There are no records of the castle being occupied since 1641, so it's been abandoned and left to ruin for a long time. To visit, it's free and can be found by following sign posts from Castlederg Main Street.
Concessions: Free entry