In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

A clear blue swimming hole with hidden caves, still unexplored.

Everyone remembers Laurie Strode from Halloween, but this is the house where most of the blood was shed.

A spur fit for a giant sits just off Highway 281 in Texas.

This grimly-titled Texas cemetery is all that remains of a Wild West settlement with possibly the worst name.

Civil War dumping ground for the bodies of terrorized Union sympathizers.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

The oldest functional consecrated church on Mustang Island.

Some of the best pastries in "the Czech heritage capital of Texas" come from a gas station off I-35.

This strategically-placed fountain creates the magnificent illusion of mustangs galloping across a river.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

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

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.

"I did this all while you were watching TV."

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."