This 17th-century mausoleum is topped with an acoustic marvel.

A nearly unconquerable island-fort in the Indian Ocean.

The largest tiger reserve in India is a vast expanse dotted with ancient ruins of Nagarjuna Viswa Vidyalayam.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

A centuries-old lookout post still sits atop a natural stone spire.

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

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

Modest by day, illuminated majestically at sunset.

A blooming house of worship for the masses.

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

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

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

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

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

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

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

A complex of six forts embedded in the Rajasthan hills.

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.

Sacred Indian temple that’s all monkey business.

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.

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.