An 18-meter-long sarcophagus of a constantly growing dead prophet.

A memorial to the thousands of Turkmen soldiers and civilians who died in a bloody 1881 battle.

Few people have ever heard of, let alone visited, one of Turkmenistan’s most impressive natural attractions.

An eccentric dictator's take on a Turkmen version of Disneyland.

A cemetery with goat-horn bedecked gravestones.

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

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

The highest monastery in the world operates a tiny guesthouse with doors open to all.

At 16,627 feet above sea level, this unstaffed station is the highest in the world.

This Tibetan monastery has survived multiple attacks and is also a sky burial site.

Described as "the world's most blinging pool."

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Final palace complex of the last of 29 Kokand rulers.

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

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

Impressive sink holes fill this untouched old-growth forest in the Bahamas.

One man's love of sea life and art has turned his home into a temple of outsider island art.

In the Bahamas sits a lighthouse that is among the last of its kind.

A full-scale sculpture of a mermaid and baby grand piano hidden underwater by David Copperfield.

A steamer run aground near Bimini lives a second life as a playground for scuba divers.

Bermuda triangle lighthouse, site of mysterious disappearances, left to crumble into the Atlantic.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

An underwater road considered a possible Atlantis location.

One of the most accessible undersea plane wrecks in the world.