Despite the ever pressing encroachment of urban sprawl this grand New Orleans manse still stands.

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

The forgotten mummies of Dakhla oasis.

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

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

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

A cave interior in the shape of the ancient rhinoceros, created by lava cooling around its carcass.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

Mysterious ancient petroglyphs carved on a glacial boulder at the tip of Bainbridge Island.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

A mysterious spirit totem at the edge of Navajo lands.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The trunks of 3,000 year-old trees lurk beneath the surface of this crystal clear lake in Oregon.

This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.

This dry lake bed contains the oldest known petroglyphs in North America.

Water of undetermined depth has attracted rare fish and cult leaders alike.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

These ancient sacred grounds granted amnesty to those who managed to reach them.