The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Home to the deepest rift anywhere on Earth.

One person's lost luggage is another person's treasure.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

1,001 carved statues of the Buddhist God of Mercy, each with a unique face.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

It houses the remains of a 17th-century version of the Titanic.

Europe’s oldest natural human mummy.

The prototype for all Nazi concentration camps.

The final resting place for the remains of 143 Habsburg royalty.

Macabre astrological automaton clock dating to the late 1400s.

A white oak with property rights.