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

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Prehistoric animals decorate this popular outdoor park.

A wall of chewing gum moonlights as collective art.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Historic funicular railway, believed to be the shortest railroad in the world.

Quite simply the largest tree in the world (by volume).

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

One of only two commuter aerial tramways in the United States.

A museum dedicated to the alleged Roswell Incident.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The world's longest known cave system.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

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

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

A beautiful geyser under environmental threat.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The first declared National Monument in the United States.

Elevated freight railway turned wildly successful urban park.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

A trash dump made beautiful by nature's power.

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