The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

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

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

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

Amazingly, this centuries-old wooden monastery is still standing today.

Myanmar's Mount Olympus atop a 2,500-foot volcanic plug.

A golden temple atop a sacred mountain, known for its giant effigy of the revered Pu Xian.

Over 2,000 ancient temples dot the Myanmar landscape at the site of this famed archaeological site.

An enormous pair of straw sandals woven in the traditional way—to keep demons at bay.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

Where Venice's gondolas go for a tune-up.

Two stone columns flank the grand Venice square, but there were supposed to be three.

100 year tradition of fist fights, marked by marble footsteps.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

This demon atop the Notre-Dame de Paris looks utterly bored.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A small 12th-century temple surrounded by waters believed to have curative properties.

A battle between nature and architecture in the Cambodian jungle.

An abstract monument to a symphonic composer.

A subterranean house of worship carved right out of the bedrock.