A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Oldest building in California still in use.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The ghostly remains of an accidental sea.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

Striking, enormous gold-plated sculpture of Buddha installed in the 19th century.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

The late, disgraced President's embalmed remains displayed for all to see… theoretically.

It is believed that the historic tower is sinking at a rate of an inch a year, though no one is completely sure why.

The remains of an abandoned air force hospital located on a redeveloped Air Force base.

Home to more than 13,000 pieces of war memorabilia and military equipment.

A memorial dedicated to the victims of the My Lai Massacre.

Under Hanoi’s medieval citadel sits a secret military headquarters from the final years of the Vietnam War.

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

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

This French colonial post office is arguably the grandest in all of Southeast Asia.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Monument to a brutal, ineffectual US bombing campaign and a sobering reminder of the human cost of the Vietnam War.

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

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.