3Houska Castle
This castle is known as one of the most haunted locations in the world. Houska Castle, located in the Czech Republic is reported to be a hot spot of demonic activity.
According to legend, the castle was built on top of a bottomless pit that is believed to be the gates of hell. The pit supposedly housed creatures that were half-human and half-animal as well as winged creatures. People claim to have seen many apparitions including a black dog, a headless figure, and a woman in a white dress. Paranormal activity also includes shrieks, moans and black winged creatures flying in the courtyard.
Ghost Hunters International investigated Houska Castle and declared it to have paranormal phenomenon.