This 880-acre facility is home to a massive collection of vintage motorcycles and cars, as well as a 2.38-mile race course.

In Paris, Texas they have their own Eiffel Tower, it just has a cowboy hat on it.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

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

A beautiful geyser under environmental threat.

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

At the time of its completion, it was the tallest dam in the world.

The first declared National Monument in the United States.

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

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

This massive roadside mascot was the first version of the giant to illustrate his butt.

This large midwestern cavern features impressive rock formations and an underground waterfall.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

This Moab institution functions as both a rock store and a small natural history museum.

A tunnel with windows, so you don't miss out on the impressive views.

This balancing rock is one of Utah's most unusual geological formations.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The location where the iconic movie character declared it was time to go home.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

A historic area for shopping and dining in Ketchikan's former red-light district.