The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

Legend has it a commoner volunteered to be buried alive in the foundation so that the great fortress could be built.

The beautiful 16th-century stepwell lies in the shadow of a famous fortress.

Ornate, dome-topped cenotaphs fill this royal crematorium.

This opulent 16th-century Maharaja’s palace is a unique mix of Hindu and Muslim designs.

Known as the leaning temple, the sacred structure has somehow developed a severe nine-degree slant.

This magnificent 18th-century hall consists of a maze of nearly a thousand interconnected passages.

A deeply beautiful 15th-century stepwell with a tragic story.

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

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

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

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

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

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.

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

A complex of six forts embedded in the Rajasthan hills.

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

A mecca for India's Jains.

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

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.

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

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