5. Poveglia Island, Italy

Poveglia, an abandoned island near Venice, has a dark history tied to the plague and executions. Once a quarantine station, it became a place where people were sent to die in isolation.
It is said that the island is haunted by the spirits of the deceased, particularly the victims of the plague. Locals avoid visiting Poveglia, warning tourists of the island’s violent past and its oppressive, cursed atmosphere. It’s one of the most forbidden places in Italy.