Kinnitty Castle, Ireland
With one Trip Advisor review leaving two stars because of apparitions, you know there’s some spooky stuff going on here. Kinnitty Castle was built in 1213, and has since been converted into a hotel. The most famous of the apparitions to haunt the halls is the Phantom Monk of Kinnitty Castle. As the Trip Advisor guest put it, “we heard breathing coming from the corner of the room. I never slept a wink all night. My boyfriend then told me he saw a shadow in the room at 3am.” While some guests might find the apparitions disturbing, others flock to the castle to search them out.