These overlooked ruins give an intimate look at the Inca Empire's urban planning prowess.

The sophisticated hydraulic system of the Nazca civilization.

This metal tower in the desert provides views of a handful of Nazca geoglyphs.

An abandoned Incan construction project left behind a mysterious "doorway."

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

The Uros people live on floating reed islands in lake Titicaca.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

An unexpected desert oasis in South America.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

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

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

The world's second largest single-dish radio telescope, once used to contact E.T.

This high desert botanical garden is a unique display of Northern New Mexico's geology.

In the middle of a desert subdivision, there is supposedly an impact crater site from Kcymaerxthaereal times.

Home of the International Space Hall of Fame.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

Originally a meeting place for foreign correspondents and war reporters, the FCC remains an atmospheric spot for sunset drinks in Phnom Penh.

A quick and simple solution to Cambodia's train woes.

This historic spot was where America's involvement in the Vietnam War officially came to an end.

The spot where the two men ate together now stands enclosed in glass.

Have fun at the world's first Buddhist waterslide park.