This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

The king of U.S. high points towers over every other peak on the continent.

The lavish temple of the Cao Dai religion that includes Buddha, Mohammed, Joan of Arc, and Victor Hugo.

World's largest cave was only discovered in 1991, and now offers tours to the public.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

A battle between nature and architecture in the Cambodian jungle.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

This Vietnamese hell cave lets visitors take a walk through a devilish underworld full of demons.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

It took 82 years and four different plaques to finally get the story right.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

This is why we can't have nice things on the Incan Trail.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Sleep in a glass pod dangling off a cliff.

Huge stone depressions which may have acted as an Incan agricultural experiment.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

This stone complex marks the urban center of a lost civilization.

A Prada store in the West Texas desert that is never open for business.

Minimalist modern art on a repurposed military base in rural Texas.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Ghost town with a beer-drinking goat for mayor.

Where a staggering 747 ships were constructed during World War II.