Roman ruins, natural methane fires and a lovely beach.

Ottoman-era houses lovingly preserved.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

Mausoleum and Holy Seat of Antiochus I of Commagene.

Mediterranean castle on a tiny Turkish island.

Naturally protected city carved from a rock face.

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

In this historic region, homes and churches are carved into ancient volcanic rock formations.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

Live a night as a Byzantine King, with a minibar and private jacuzzi.

The most famous location in China was home to whole dynasties worth of imperial rulers.

This ancient Chinese observatory still contains early astronomy technology.

This smaller cousin of the Forbidden City has gone from ancestral sacrifice to tourist's whispers.

Enchanting cave with a river crashing through the roof.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

This elephant kraal is the only one remaining in Thailand, dating back to the 16th century when these massive mammals were integral players in war and trade.

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

Stone shrouds of Prince Liu Sheng and Princess Dou Wan of the Han Dynasty, created to preserve their flesh for eternity.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

Beijing's World Park offers the excitement of international sites without the travel.

Ming Dynasty necropolis raided during the Cultural Revolution.

This probably wasn't what Mao had in mind.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.