3. The Catacombs of Paris, France
Beneath the streets of Paris lies a network of tunnels filled with the bones of over 6 million people. The Catacombs are not only macabre but also rumored to be cursed, with numerous ghost stories circulating about restless souls.
Though a popular tourist attraction, many locals caution against exploring too deeply, as some claim to experience disorientation, strange sounds, and even sightings of figures in the shadows. The eerie ambiance leaves a lasting impact on visitors.