The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

The wartime prison now features haunting sculpted reenactments of the atrocities that took place there.

This Vietnamese bar doubles as a multistory labyrinth.

This striking landscape in northern Vietnam contains both geological and archaeological wonders.

Step into a cartoon at this Seoul café that aims to evoke a two-dimensional scene.

Secret North Korean passage discovered below the world's most dangerous border.

The ruin of a Japanese love hotel almost completely overgrown with brambles.

These Japanese gardens are blankets of light for dark winter nights.

One of Japan's most famous sights, the bridge was originally built in 1673.

Nine Gardens in one—with tea service.

A 70-foot-deep ice cave formed by lava from Mt. Fuji on the edge of Japan's "Suicide Forest." 

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

The magical, mossy forest that inspired Princess Mononoke.

Hot springs monkey spa in the middle of Hell's Valley.

A series of recreated fortifications mark George Orwell's path through the Spanish Civil War.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

A midnight snack that lights up the night.

The first island in the world designated a light-pollution-free astronomical observation point.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

An anthropological theme park that depicts the cultures of around 20 different countries.

This Denmark theme park is part family attraction, part experimental archaeology project.

The eclectic observatory castle of a 19th-century astronomer and explorer.

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.