This rare basalt crater lake is used to study the Moon and Mars.

This 11th-century temple gave rise to the word "juggernaut," as well as some mysteries that defy scientific explanation.

The roof of one of the world’s largest spice markets provides a grand view over the neighborhood's glorious bustle.

These medieval funerary monuments are now home to a colony of critically endangered vultures.

Half-size replica of the Taj Mahal.

An architectural marvel that dates back to the zenith of Indian architecture.

This abandoned stepwell is one of the largest, deepest, and certainly one of the creepiest in India.

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

A nearly unconquerable island-fort in the Indian Ocean.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

A startling, centuries-old subterranean marvel hides in plain sight.

These particularly resplendent rodents are the state animal of Maharashtra.

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

A complex of six forts embedded in the Rajasthan hills.

This magnificent stepwell is designed as an inverted temple and adorned with 1,500 sculptures.

A single tree's 2,800 aerial roots give the appearance of a complete forest.

Rock-cut cave complex filled with ancient Buddhist artwork.

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

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

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

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.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

Centuries-old bridges grown from tangled roots.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.