7. Dragsholm Slot in Sealand, Denmark
There are three ghosts that roam this castle. There’s the Grey Lady, who is said to have been a worker there; the Earl of Borthwell; and the White Lady, who is said to have fallen for a common man. Her father then imprisoned her in the dungeons as punishment. In 1930 when building new toilets for the castle, the skeleton of a woman in a white dress was uncovered.