5,000 skulls in memorial to those killed by the Khmer Rouge.

A castle built for love, and abandoned due to heartbreak.

This sculpture was made in 1973 for the city's 300th-anniversary celebrations and was largely considered an eyesore at the time.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

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

A limestone wonderland of water and subterranean secrets.

This bridge made famous in a novel and on-screen wasn't actually built over the river Kwai.

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

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

The largest single concentration of harmless garter snakes in the world is a writhing Canadian serpent orgy.

The ruins of a burned-down monastery have become a serene park and community space. 

A tribute to the man who invented basketball stands in his Canadian hometown.

The metal truss bridge served as the sole entry point to an "isolation island" for smallpox outbreaks throughout the 1870s and early 1940s.

At a museum of everyday objects, it is the act of collecting that is really on display.

66,000 pieces of art, donated by one of the world's richest men.

In Chapultepec Park there is a pavilion gifted to Mexico from South Korea to honor the 1968 Summer Olympics.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

Every year, the colorful murals of Montreal get a complete makeover.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

An indigenous take on European design creates a stunning visual overload.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.