This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

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

This Himalayan airport provides one of the most difficult landings in the world.

Strange, gentle beasts resembling goat-cow hybrids roam within this patch of forest.

This giant Buddha statue has 125,000 smaller Buddhas hidden inside it.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an eighth-century Buddhist master.

Towering at a height of over 30 meters, this turn-of-the-18th-century landmark is the tallest temple in Nepal.

The former stronghold of the Malla Dynasty has remained virtually unchanged since the 17th century.

This historic square in Nepal is home to temples dating back to the third century.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

The singular ruins of a mysterious lost city.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

The winter home of millions of migrating monarch butterflies.

The famous artist couple lived and worked here, in two different houses separated by a bridge.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

This famous city eluded concrete detection until the early 2000's.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

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

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A refurbished locomotive from a bygone era in the middle of the Jordanian desert.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.