You can voluntarily spend the night in prison

Karosta Prison is located in the city of Liepaja, Latvia, a small country in Northern Europe. Originally built as an infirmary, it was used as a prison by Nazis and Soviets during WWII. Thousands of Latvian deserters were executed here by Nazis. According to an unofficial count, at least 5000 people were killed in one way or another at the Karosta Prison facility, the majority of whom were shot. Surprisingly, this prison has now been converted into a museum and hotel where you can stay in one of the jail cells.

Checking in handcuffed, having your mug shot taken, sleeping on a mattress on your cell's cold floor, agreeing to verbal abuse by the well-trained staff (dressed and acting as uniformed soldiers), and being subjected to physical exercise and even prison cleaning if you don't comply are some of the highlights of your stay at Karosta Prison. This is clearly not for the faint of heart. If you consider yourself to be strong, the haunted house will put you to the test in other ways. Bulbs falling out of their holders, doors opening and closing on their own, sobbing and crying sounds, a sudden unearthly cold, most likely a paranormal presence, and spirit sightings are all common occurrences on prison grounds, according to guards and staff. The unique model of the prison converted hotel has however attracted many tourists from across the world.