A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

The world's largest underwater restaurant is submerged off the southern tip of Norway.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

Norway has built what may be the world's most beautiful public toilet.

Once a black market electronics marketplace, now an otaku shopper's paradise.

This tiny museum immortalizes the birthplace of an iconic Chinese-Korean noodle dish.

This bed and breakfast is steeped in history and offers guests a unique way to experience nature—glass igloos on a frozen lake.

This tiny little island has, as the name says, just enough room for its single house.

The world's first and only three-segment bascule bridge folds up into the shape of a capital "N" to let boat traffic through.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

Enter the cabin of a life-sized Hindenburg replica.

This extremely remote border crossing was closed to prevent smuggling and looting.