Dating back to 1185, Malahide Castle hosts at least five resident ghosts. The most famous, Puck, a jester who fell in love with a noblewoman, was killed after a forbidden affair and still appears in photographs near the tower. Others include Lady White, seen gliding through the great hall, and a knight who vanishes mid-stride. The castle’s blend of medieval splendour and heartbreak makes it one of Ireland’s most visited haunts.