A fiery crater has been burning in the Karakum Desert since 1971.

An extraordinary "City of Caves" carved from solid stone.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.

Siddhartha Gautama sat here and received enlightenment.

Rock-cut cave complex filled with ancient Buddhist artwork.

Jumping-off point for a climb up Mt. Everest is the most dangerous airport in the world.

Last stop before the top of the highest peak in the world.

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

Nailing a coin to this holy stump is just another way to ask the gods for relief from dental pain.

Sacred Buddhist home of some spiritual monkeys.

The last operating synagogue in Afghanistan is run by Zablon Simintov, the last remaining Jew in Afghanistan.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

A complex of six forts embedded in the Rajasthan hills.

Old and brave breed of warhorses known for their elegant, curved ears.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

The world's second-largest sundial, made entirely out of stone.

A blooming house of worship for the masses.

Time has stopped at the house where Gandhi died.

An ancient iron pillar in Delhi that seems to be rustproof.

The place that allegedly inspired James Hilton's depiction of Shangri-La.

The abandoned site of the Beatles spiritual awakening and subsequent revolt.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.