The other side is actually green.

A fortified city, home to a remaining population of five families

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

Mosaics, storks, and brothels—this ancient city has it all.

One of the most spectacular canyons in the world.

A mocking tribute to the past and modern leadership of Prague.

Monument to a suicide protesting the Soviet invasion.

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

This artificial cave looks like something out of a fairytale.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

A serene space tucked amid the skyscrapers of Hong Kong's bustling financial district.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

This collection of lakeside pagodas and temples are flanked by giant lions, tigers, and dragons as well as their welcoming maws.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

This Taiwanese promontory is covered in otherworldly hoodoo formations.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

A waterfall runs right through the middle of this Taiwanese shrine to the hundreds of workers killed while building a nearby highway.

Five miles of underground river link lake to ocean.

A patch of Philippines forest devoted to saving the lives of an emotionally sensitive species of googly-eyed primates.

Bohol's mysterious brown hills.

Hundreds of wooden coffins dangle from cliffs and caves in the Philippines.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.