Once home to Komodo dragons, this island dreamscape has a rare combination of white, pink, and black sand beaches.

A part of the world's largest marsh seems to be growing bright red Martian grass.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

These "50 Fortresses" have been unearthed in the ancient oasis of Khwarezm.

Ancient barriers wrap around what was once an important stop along the Silk Road.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

The Avenue of Mausolea is a series of grand palatial tombs.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

Visit this playground of waterfalls, caves and sinkholes.

A volcanic landmark located on an Ice age lake bed.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

Curious rock formations in a tiny Kansas state park.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.

Clean, cold drinking water flows from a nondescript pipe in a roadside rock face.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Mountain known by the Tillamook Tribe as "the place of the supreme deity."

Only intact Ichthyosaur skeleton in the United States.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Curious cave that stays a cool 56 degrees all year long.