It's 2 billion years old!

Bridge that died in war and was resurected.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

An ancient pagan site swirling with legends in the foothills of Franconian Switzerland.

A tiny basalt mountain with an observation tower overlooking the beautiful Bavarian countryside.

A 1542-foot-long suspension bridge offers scenic mountain views.

A natural arch offers panoramic views of Yangshuo's karst hills.

Over 3 miles up in the Himalayas this pass is one of the highest drivable roads in the world.

Mountain of unimaginable riches that bankrolled the Spanish Empire, complete with its own underworld god.

This Cold War–era underground city includes offices for Mao Zedong and Lin Biao.

Intensely colorful calcite pools in Southern China.

Natives of this mud-brick desert village use an ancient irrigation system to grow sweet, seedless grapes.

Hundreds of caves filled with thousands of centuries-old statues and murals.

A symbol of Islam in oil-rich Brunei.

A spectrum of colors awaits visitors to one of Mexico's most gorgeous bodies of water.

The largest open-pit gold mine in Canada.

Quality time with reindeer in the stunning scenery of their natural Lappish habitat above the Arctic Circle.

Small Island off the coast of Greenland.

British Empire's last territorial expansion, claimed by four countries.

Would you dare to dangle from a great height in a wooden basket?

Enchanting cave with a river crashing through the roof.

Scattered ruins and a tiny cemetery are all that remain of a failed attempt to colonize the inhospitable Desolate Islands.

The largest piece of no man's land left on Earth.