Not one, not two, but three natural bridges remain in this captivating spot post-sinkhole.

A harrowing trail up a mile-high mountain.

Rock-cut caves and 7,000 Buddhist sculptures carved into the nearly sheer face of a sandstone mountain.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.

These fantastically named natural pools look like something out of a Scottish myth.

A magically clear, blue river that seems to spring from nowhere.

This picturesque round lake is said to be home to the legendary Mokèlé-mbèmbé.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

Extravagant mosque honors modern Islam.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

A grand example of 19th century Burmese teak architecture, and the most significant of Mandalay's historic buildings.

Naturally protected city carved from a rock face.

Every autumn, this hillside is ablaze with red summer cypress.

An ethereal glowing blue ocean cave in Croatia.

The largest prehistoric ruins south of the Sahara, once a powerful center of international trade.

The Great Wall of Sindh, Pakistan's mighty fort.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

Living trees form the structure of an open-air palace.