Fossils, railroads, and waterfalls!

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

This historic railroad hotel built from Kansas limestone was once the most popular hotels for traveling salesmen in the midwest.

This former mining railroad is one of the best-preserved short lines in North America.

In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

Some 10,000 works of ancient rock art cover these volcanic basalt outcrops near the Gila River.

This giant steer-skull edifice refuses to die.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

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

Ancient pueblos built into the base of a natural canyon wall.

America's only nuclear missile silo open to the public.

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

A sharp bend in a dramatic river canyon cut through red rocks.

What is the Thing?

Limestone caves with spectacular showcase chambers.

All aboard the world's longest miniature railway.

A graveyard for early settlers, sometimes called Old Pioneer Cemetery, hidden in the woods on a hillside.

The steepest tramway in North America provides stunning views of the out-of-the-way Wallowa Mountains in northeastern Oregon.

A trash dump made beautiful by nature's power.

Haunting and beautiful trees, doomed to die.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

One of the most unusual geological features, recognizable from a dozen hit movies.