At 8,000 feet, the world's highest tea estate draws visitors for both its products and its panoramic views.

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

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

Modest by day, illuminated majestically at sunset.

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

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

A blooming house of worship for the masses.

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

A complex of six forts embedded in the Rajasthan hills.

Rock-cut cave complex filled with ancient Buddhist artwork.

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

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

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.

Centuries-old bridges grown from tangled roots.

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

The rocks around this mountain are filled with so many carvings that the area became known as the "open library."

Lions carved into the rockface adorn these two tombs built into the mountains of Dadan.

This giant volcanic crater holds its very own field of salt.

A 19th-century fortress and collection of artifacts offer a tour of Saudi history.

These towering cliffs jut dramatically from the middle of a barren desert.

Village of slate houses, built on a white marble outcrop.

Within the Saudi Arabian desert lies a 2,000-year-old ghost town made of stone and mud.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

An unfinished tomb carved into a giant boulder in the Arabian Desert.