This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Perhaps the only one of its kind, the nearly-forgotten site once held mortal (and rigged) gladiatorial games between tigers and imperial war elephants.

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

Out of all the statues of Ho Chi Minh in Vietnam, this one is the tallest and the most impressive.

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

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

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.

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

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

A gift from the Soviet Union in the 1980s, this is the only statue of the Soviet dictator in Southeast Asia.

Also known as the "Red Taj Mahal."

Half-size replica of the Taj Mahal.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

Drink and dine in a coral cave that's at least 120,000 years old.

A fortified palace in the shape of a ship on the Thiou river.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

The university library shaped like a giant piece of Swiss cheese.

Florentine Renaissance style building in Switzerland, home to the world's largest taxidermy Great White Shark.

Standing stones found on a construction site are re-erected.

A constellation of golden cobblestones shows the names of local children born under a full moon.

Artworks by loners, prisoners and the criminally insane.