The hallucinogenic center of the ancient world.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

This tiny shop has been serving traditional tamales for more than 200 years.

This whimsical home made entirely from clay is basically a giant piece of pottery.

An ancient city hidden in the heart of the Sierra Nevada mountains.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

The caldera of this mini-volcano has been turned into a naturally heated mud bath.

Enchanting cave with a river crashing through the roof.

The Andean town where every single building is decorated with a brightly colored frieze.

This picturesque mansion has gone from opulent ruin to nature museum.

A dangling church built over a Colombian gorge.

An explosion of natural color known as "the river that ran away from paradise."

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

The ancient remains of this natural fortress can still be found along the Silk Road looking surprisingly preserved.

Monks turned this mountain into a temple by digging grottoes, tunnels, and a huge pagoda-like hall.

This massive neon wheel is the only one of its kind to be built over a bridge.

This highest bridge in the world spans such a great chasm that it had to be established using rockets.

This Tibetan monastery has survived multiple attacks and is also a sky burial site.

The highest monastery in the world operates a tiny guesthouse with doors open to all.

Sited in an Inner Mongolian desert are the remnants of an important trade stop along the Silk Road.

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

The world’s tallest outdoor lift stretches along the stone pillars that inspired the floating mountains in the movie “Avatar.”

A magical work of architecture where a wind turbine enables monks to levitate.