The largest wooden building in the world now houses a fascinating collection of aircraft.

The wooden airship was the largest flying boat ever built.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

"The only replacement for a DC-3 is another DC-3."

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

Home of the International Space Hall of Fame.

A building so large that it has its own weather.

The final resting place of a space program monolith.

A real-life "hobbit" cave in Flores, Indonesia.

The unique design was created by the traditional way communal rice paddies were divided among the indigenous people.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

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

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

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

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

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

Eat a meal surrounded by bomb fragments.

The ruins on a deserted tropical island in the Philippines bear the scars of WWII.

A man-made island designed to look like a massive battleship.

Villagers have recycled bomber fuel tanks from the Vietnam War and turned them into very, very strong boats.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.