This bike path traverses the treetops.

The tallest church in Mechelen might have been the tallest in the world if not for a lack of funds.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

A chapel quietly preserves the remains of Father Damien, who devoted his life to caring for leprosy patients.

Where George Lemaître discovered the expanding nature of the universe.

This unassuming stone bollard is a centuries-old marker denoting the center of the city.

This statue of a studious young woman stands at the site of Leuven's first college to accept female students.

A monumental toilet that is also host to rare plants.

This 19th-century zoological collection has withstood the test of time.

A giant bug impaled on a 75-foot-tall needle.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

The world's largest bamboo labyrinth is a living demonstration of the plant’s immense potential.

This sensational silver temple is the product of centuries of metalworking.

Bangkok's take on the High Line is a park on a traffic bridge above the iconic Chao Phraya River.

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

For centuries young Thai men used this Giant Swing as a slingshot to heaven.

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

Visit a century-old sweet shop serving gold-standard mango sticky rice.