Located in County Offaly, Ireland, Leap Castle has a gruesome history that has earned it the reputation of being one of the most haunted castles in the world. The castle was built in the 15th century and has seen its fair share of violence and bloodshed over the centuries. One particularly gruesome event involved two brothers who fought to the death over who would inherit the castle. Visitors to the castle today report feeling a dark presence and have claimed to see apparitions, particularly that of a woman known as the “Red Lady,” who is said to have been killed in the castle’s chapel.