Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

The temporary burial site of the man who shot and killed Jesse James.

This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

The oldest attraction in Disneyland is a prehistoric stump that Walt may have bought for his wife.

Divers can encounter an abandoned warship encircled by a giant kraken submerged in the British Virgin Islands.

Preserved portions of Athens's ancient defenses are on display in a subterranean parking garage.

The ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

The remnants of a creative early method of wildfire prevention.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

This small interfaith chapel lies not far from the rim of the Grand Canyon.

Oddly shaped rock formation, misassociated with a nearby utopian community.

This seaside sanctuary was once one of the most important religious sites for women in ancient Greece.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

All that remains of this abandoned coal town is a beautiful, haunting cemetery.

The oldest continuously occupied public building in the United States.

Thousands of mounted insects, and some live ones, hide within an otherwise ordinary shopping mall.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

One of the American Southwest's most extensive collections of Navajo rock art.

The world's first commercial spaceport is a disappointment of cosmic proportions.