The Avenue of Mausolea is a series of grand palatial tombs.

A trash dump made beautiful by nature's power.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A unique seaside cave where Aleister Crowley faked his own death.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

When humans abandoned this safari lodge, the lions took over.

Hidden amid the tropical forest in the Caribbean Sea are the decaying ruins of the Cocaine King's luxurious island party home.

Surreal riveted sea forts once protected the Kent shores from German attack.

An abandoned desert hamlet swallowed up by sand.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

Far from the shore, this sandy victim of the Skeleton Coast looks like it was plopped in the middle of the desert.

An abandoned outdoor movie theater in the Sinai desert.

The scene of the United Kingdom's most famous UFO incident, dubbed the "British Roswell."

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

This abandoned five-star hotel is now a five-star urban exploration destination.

The most disputed archipelago in the world.

One of the biggest markets in Asia, under one of the continent's largest domes.

Light still pours into the ruins of this ancient Islamic observatory.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

Tropical paradise strewn with hundreds of World War II wrecks.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

A fiery crater has been burning in the Karakum Desert since 1971.

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.