A seemingly endless landscape of pure salt stretches far across Bolivia.

This penis-focused monastery is dedicated to Buddhism's "Divine Madman."

This garden is very fertile.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

The small sanctuaries lie just off the beaten path near one of Bhutan's most famous attractions.

A tropical paradise once home to space exploration and military installations.

This subterranean town of over 50 dwellings lies thirty feet beneath the Earth's surface.

A monument to the more than one million enslaved Africans deported from the port of Ouidah.

This massive Maya archaeological site is home to the tallest man-made structure in Belize.

An important Mayan religious and trading center dating back to 200 BC.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A massive underwater sinkhole made famous by Jacques Cousteau.

Climb inside an iron crystal magnified 165 billion times its normal size.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

A striking Soviet memorial commemorates the liberation of Belarus from the Nazis.

Remnants of the city's Soviet history hover over this modern fast-food outlet.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

A giant gun barrel in Barbados that once hoped to shoot outer space with science.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

Where giant ships go to die.

This colorful palace is an oasis of calm amid the hustle and bustle of the Buriganga riverfront.

Skyscraper powered by wind turbines attached between its towers.