The world's strangest ghost towns are home to dark secrets, creepy buildings and eerie sights; new discoveries reveal why they were abandoned. ...

Yugoslav strongman Josip Broz Tito's secret Cold War military compound on the Croatian island of Vis, San Francisco's Sutro Baths, Australian Convict Sites in Port Arthur ...

The ruins of a once-palatial compound contain the secrets of one of history's most notorious criminals, and new discoveries reveal why this high-security estate was built ...

Tunnels filled with human bones lie beneath the streets of Paris, and this horrifying engineering marvel points to a dark secret. New discoveries reveal why this grisly u ...

A ghost town in the American West was once a Gold Rush hotspot and one of the most violent places in America. Today, there are legends of a secret treasure buried in the ...

A huge derelict compound near Alaska's frigid coast. A park in Spain stands forgotten despite vast numbers of visitors. Concrete structures form a line through Western Ge ...

A strange complex of tunnels on the grounds of a bizarre mansion were under lock-and-key for a century, and since its rediscovery, some believe its mysterious place is a ...

Berlin's mysterious prison complex and office block. A massive pit carved out of the Western U.S. coast. An underground labyrinth crumbles in the shadow of Mt. Vesuvius. ...