Roman ruins top white travertine terraces formed by ancient hot springs.

1513 Turkish world map, full of European state secrets and snarky commentary.

A marvel of Byzantine engineering under the streets of Istanbul.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Iceland's largest lagoon is home to stunning multi-colored icebergs.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Ming Dynasty necropolis raided during the Cultural Revolution.

Hidden behind musical flora and forgotten for over a thousand years, this cave is now a neon dream.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

God's Saharan sandbox of wrath.

One of the most spectacular canyons in the world.

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

An abstract monument to a symphonic composer.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

A subterranean house of worship carved right out of the bedrock.

This massive subterranean fissure is known as the "underground Grand Canyon."

A whimsical bridge adorned with decorative dragons.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.