A monument to the egos of two railroad magnates that fell into decline along with their careers.

This UFO landing strip was created by a charitable Wyoming city that was worried about residents of Jupiter.

One of the smallest towns in the United States.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

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.

Home of the International Space Hall of Fame.

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

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A cave's rare beauty held a cavernous secret hidden underground.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Legends surround this jagged rock formation in the New Mexico desert.

Roaming bison and a spectacular view at the highest point in Nebraska.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

Giant granite rocks standing end-to-end like a train of circus elephants.

Less a museum than a bizarre fantasy world created by artists and engineers.

This largely forgotten piece of Cold War history stands hidden in the woods just north of the Mississippi Gulf Coast.

As its grandiose name implies, this wooden dome is unsurpassed in size.

Watch the ships come in on Michigan's 210 ft. high observation deck in Sault Ste. Marie.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.