2. Dunluce Castle Ruins (Antrim County, Northern Ireland )

Image via Wikimedia Commons

The ruins of Dunluce Castle are accessible only by a bridge. Built in the 16th and 17th century, the place has a somewhat unlucky history. A fire destroyed the nearby town during the Irish uprising of 1641. The kitchen of the castle collapsed into the sea at some point, and a ship from the Spanish Armada shipwrecked just nearby, killing 240 people