The haunting ruins of Jack London's dream house.

These homes carved into the mountains seem to defy the laws of nature.

An ancient stone fortress considered by many to be the eighth wonder of the world.

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

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

The world's largest Tibetan refugee settlement.

Limestone caves with spectacular showcase chambers.

Modest by day, illuminated majestically at sunset.

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

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

A nearly unconquerable island-fort in the Indian Ocean.

A mecca for India's Jains.

Rock-cut cave complex filled with ancient Buddhist artwork.

A local landmark that has become a hub of graffiti and urban exploration.

Half-size replica of the Taj Mahal.

An abandoned Cambodian resort that mirrored the downfall of the country as it was happening.

A sturdy relic of Britain's once crucial gunpowder industry is now a haunting Cornish ruin.

Grandpa Rainbow felt the neighborhood needed some color, so he picked up a paintbrush and went to work.

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.

100-year-old shipwreck you can walk up to at low tide.

Taking the 3D art experience far beyond blue and red glasses.

The home of the world's first and last remaining "wooly ant."

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.