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

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

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

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

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

Rock-cut cave complex filled with ancient Buddhist artwork.

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

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.

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

A mecca for India's Jains.

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.

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

Massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

This Tang Dynasty behemoth is the biggest Buddha in the world.

A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

These layered sandstone mountains in China look like they are made of pressed crayons.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

A fifth-century temple improbably built into the side of a cliff.

A part of the world's largest marsh seems to be growing bright red Martian grass.

One of America's founding fathers lived in this London lodging between 1757 and 1775.

This hydraulic power system in London was, at one time, seen as a rival to electricity and the last of its kind to shut down.

This artificial lake surrounded by Brutalist architecture served as a stand-in for futuristic Britain in Stanley Kubrick's 'A Clockwork Orange.'

At this small museum, visitors can view artifacts from the only battlefield in London during the War of the Roses.