The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

Considered by many to be one of the most dangerous highways in Alaska.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

An abandoned town is hidden in Great Smoky Mountains National Park.

The land is home to swimming ponies and a legendary 18th-century treasure.

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

Stairs often replace streets on the steep slopes of this old mining town.

The unusual burial monument of Arizona's first governor.

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

These free-roaming horses were once destined to disappear from the land.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

An urban laboratory.

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A once grand hotel is being retaken by the wilderness it once capitalized on.