The mysteries surrounding suspected haunted buildings span the entire Door Peninsula. Two reportedly haunted places with friendly spirits of previous owners of businesses are the Karsten Hotel in Kewaunee and Nelsen's Hall on Washington Island.
Three spirits are said to haunt the Karsten Hotel, which was initially the Karsten Inn. The owner William Karsten, Sr. who died in 1940, his grandson Billy who died at the age of five only three weeks after his grandfather, and Agatha, the housekeeper, apparently do not want to leave the hotel.
Current Karsten Hotel owner Alex Yanik shares an unexplained phenomenon he experienced while at his establishment.
Other eerie occurrences reported at the Karsten Hotel included orbs, odd things that appear in photos, apparitions, cold and hot spots, strange aromas, and many sounds, including whispering, flute-playing, moving furniture, and a child's running footsteps.
On Washington Island, Nelsen's Hall Bitters Pub is reportedly haunted by the original owner Tom Nelsen, who periodically breezes through the historic bar. Tom Nelsen passed away in one of the upstairs rooms of the hall in 1960 and established the famous "bitters club" that is still in place.