A nearly unconquerable island-fort in the Indian Ocean.

The ancient water tanks remain some of the ruined city’s most beautiful architecture.

An abandoned settlement originally established by British colonialists in the Andaman archipelago.

A centuries-old fortress city lies in ruin.

An eclectic mix of influences rot together in harmony in this India necropolis.

The Indian capital of black magic and witchcraft.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

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

A former bastion of Rajput chivalry, this massive hill fort is the site of legend and tragedy.

These particularly resplendent rodents are the state animal of Maharashtra.

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

This hilltop warren of monastic dwellings is the result of centuries worth of Mongol attacks.

Hidden in the shadow of a rocky fortress is one concubine’s long-forgotten legacy.

A blooming house of worship for the masses.

This abandoned fort is said to be the most haunted place in India, so much so that entry is prohibited after sunset.

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

This experimental utopian "city of the future" in rural India may hold a dark secret.

A complex of six forts embedded in the Rajasthan hills.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

Sacred Indian temple that’s all monkey business.

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.

The remains of what was, not so long ago, the world's largest city.