The mummified relic of St. Antoninus.

Abandoned concert venue legendary for its rock counterculture.

A stone wall that mysteriously moved three feet from its foundation.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Historic marionette theater features thousands of handmade puppets and free cups of ice cream.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

Church and home-museum of a 1920s female revivalist preacher with a very sordid past.

The ancient tomb acts as a calendar that keeps perfect time.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

An abandoned movie set in the desert of West Texas.

Shop selling 500 flavors of soda has something for everyone.

This small primate research island is teeming with playing, fighting wild monkeys.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

The forbidden island of the Tuscan Archipelago may still contain buried treasure.

The largest self-built castle in the U.S., six decades in the making.

A wild annual race in Sardinia re-enacts Constantine's victory in Rome.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Angels, demons, and tortured souls on a giant wall mural in a little church.

These "bridges" help confused bats cross the road.