Glacial lake that mysteriously empties itself every year.

Unique geological formations in China, featuring some suggestive shapes.

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

A lush desert oasis in the shape of a narrow crescent.

The largest dinosaurs in the world, kissing above the highway.

Intensely colorful calcite pools in Southern China.

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.

The largest dam in the world and the site of a potential disaster.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

Where Stoddart and Connolly suffered in the infamous Bug Pit.

Beatlemania is still going strong... at least in Kazakhstan.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

Time capsule of a museum, in which the Soviet Union remains alive and kicking.

Mysterious spherical rocks in the semi-desert of western Kazakhstan.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

Touching displays of wishes for peace from the Cold War era.

Looking for a unifying history, Uzbekistan finds its answer in a 14th Century Turco-Mongol conqueror... despite the fact he wasn't Uzbek.