The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Nazca pilgrimage site covering 370 acres is a popular stop for archeologists and looters.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Centuries-old bridges grown from tangled roots.

Pompeii's less famous neighbor is still revealing her secrets.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

The atmospheric road was never meant to be so creepy.

A battle between nature and architecture in the Cambodian jungle.

This massive chapel in the middle of the Indonesian forest is both haunting and fowl.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

A collection of crumbling mansions stand as a reminder of a more prosperous time in this Indian village.

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

The world's largest secondhand book market is a haven for bibliophiles and bargain hunters.

A centuries-old fortress city lies in ruin.

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

Rock-cut cave complex filled with ancient Buddhist artwork.

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.

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

Years of archaeology, just chillin' by the water cooler.

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.