This hotel was used during the Manhattan Project to house official visitors.

John Hendrix predicted the creation of the "Secret City" built as part of the Manhattan Project.

A roadside music shop featuring a confounding series of folk art installations.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

This stone memorial pays tribute to a massive shipwreck which was sadly overshadowed by the death of John Wilkes Booth.

Over 200 people were buried here with only a small stone to mark their final resting place.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

Mile-long cave system near Great Smoky Mountains.

The art studio of an early 20th-century painter, hidden amid the Great Smoky Mountains.

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

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

A Surreal flight of architectural fancy in Vietnam's Central Highlands.

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

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

This whimsically named Vietnamese stream is closer to a walkway than a waterway.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

This cavern was used as a hidden hospital and safe house during the Vietnam War.

This network of tunnels housed an entire village for years, and even had a hall for screening movies.

One of the oldest temples in Ho Chi Minh City, dedicated to a deified Chinese military leader.

An ornate tomb pays tribute to one of the most influential and cherished military leaders in Vietnam's history.

This Vietnamese bar doubles as a multistory labyrinth.

Executed at age 19, this Vietnamese schoolgirl is now a national hero and symbol of revolutionary spirit.