An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

A Turkish ghost town abandoned in a population exchange with Greece.

A house carved into a rock in the 1940s.

A beautiful geyser under environmental threat.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

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

A walk through the historic city center, under the streets of Seattle.

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

A Mysterious Masonic tomb in San Luis Obispo.

A snake farm famous for its venemous varieties.