The ruins of a medieval castle linked to the murderous French lord that inspired the famous legend of Bluebeard.

The mummified relics of an American missionary.

Mysterious heaps of stones dot these otherworldly woods.

Iran's colorful terraces are a rare geological masterpiece.

A gigantic sculpture garden is packed with innovative oddities.

This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

Warsaw's fantastically preserved gasworks...almost.

Thanks to this small string of islands World War II still hasn't officially ended between Russia and Japan.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

Lithuania's outdoor sculpture trail of wooden folk art.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

A desperate final message left by a POW on the run serves as a memorial for himself and the 97 that died with him.

The aggressively banal name of this underground fortress of bureaucracy does little to evoke its truly surreal existence.

This foolish Victorian sea fort was converted to a deluxe hotel.

This crescent-shaped sliver of sand is a magical haven for a herd of feral horses.

The world's most remote permanent settlement on an active volcano.

Behemoth, cannon-like telescope operated by generations of Irish earls.

A funhouse dummy that turned out to be a real life mummy, Elmer McCurdy is an urban legend come true.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

Giant naked man on a hillside.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.