This dangerous-looking suspension bridge may have been too unstable to remain open.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

This rare wildlife haven in Singapore feels like you're in the tropical rainforest.

A Buddhist theme park brings you a Buddhist version of Hell.

This lake-bound geographical marker sits at the point where three European countries intersect.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

The smallest restaurant in the world.

These Finnish rapids have been attracting tourists for over a hundred years and are now released with the push of a button.

Nuclear waste experts study this prehistoric crater lake to envision landscapes one million years in the future.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

This intricately spiralling forest was created as a monumental work of art.

A beautiful Arctic museum and nature center preserves the culture of the Sámi people.

The last permanent exhibit dedicated to the Soviet leader.

Formerly Fire Station No. 27, the museum is a hidden gem in the heart of Hollywood.

Two World War II aircraft lie within the jungle around this abandoned runway.

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

Hamburgers are intensely proud of their tunnel beneath the river.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

Remnants of an exploded schooner and wrecked submarines form a breakwater.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.