An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Medicinal spa created with the discharge from a geothermal energy plant.

Reaching the "Church in the Sky" requires scaling the cliff face of a sandstone pinnacle with a 650-foot drop.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

A huge communist-era propaganda monument and mural that offers stunning views of the Mongolian capital.

Enormous statue of the Emperor of the Mongols.

Moscow's imposing monument to the Space Age.

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

This Russian religious complex is a Frankenstein's chapel that includes influence from almost all the major faiths.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

A glacier pocked with ice caves and surrounded by rainforests.

Tubing through a cave lit with glowworms is a magical underground experience.

Try not to get lost in this picturesque Brazilian labyrinth of the dead.

A faux desert landscape in the middle of the jungle that sprouts oases during the rainy season.

A restaurant modeled after feudal Japan, where the waitstaff are trained as ninjas.

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

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

This neighborhood thoroughfare is haunted by dozens of homemade monsters.

A 20-meter (65-foot) robot towers over Tokyo Bay.

Experience park where visitors are told to expect the unexpected.