This cavernous swimming spot doubles as a home to the largest known colony of bats in Central Asia.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

This Russian diner is staffed entirely by twins.

This spacecraft-shaped water tower is only a part of the mysterious UFO mania in this Brazilian town.

An endless sea of white conical domes.

Final resting place of Antarctic explorer Ernest Shackleton.

The most alien-looking place on Earth.

A city built from mud and known as the "Manhattan of the desert."

Land that belongs to no nation.

Remains of an abandoned coral city.

These Nubian pyramids are strange and unique, even by pyramid standards.

This uninhabited volcanic island is the most remote in the world.

An Ethiopian "Jerusalem" featuring a church hewn out of a single rock.

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

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

Once living up to its name as the grandest hotel in all of Africa, the Grande Hotel is now home to a community of squatters.

Sculpture park built by a 50-year-old widow.

The remains of diamond fever taken over by the desert.

Bizarre living fossil only grows in a small chunk of the Namib Desert.

Welded sphere dropped from space.

A beautiful oasis town dating back to the Roman period still serves as reprieve from the brutal summer sun in Libya.

One of the most spectacular canyons in the world.

The world's first and only natural nuclear reactor.