A volcanic fissure over two miles long and up to 70 feet deep.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

England's most notorious suicide spot.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

The 43-mile route crosses through six islands with gorgeous views of the Seto Inland Sea.

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

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

This massive subterranean fissure is known as the "underground Grand Canyon."

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

A little-visited waterfall in an otherworldly landscape.

Bacteria and algae give the salty water its bubblegum hue.

The largest stone moai on Rapa Nui.

Intensely colorful calcite pools in Southern China.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.