One of the few surviving "Wigwam"-themed motels.

A Memphis park where you can walk the whole Mississippi River in one go.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Massive still life just off the highway in Kansas.

A fitting attraction for the corn capital of the world.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

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

The American rainmaker and a burst dam.

Oldest building in California still in use.

Concrete strongholds stand guard over the Golden Gate.

Commonly referred to as the most photographed Victorian home in the United States.

A Roman-style column in Oregon hides a spiral staircase inside.

What happens when a sculptor has to find a way around a 100-year-old copyright.

A smoke stack so large, the Washington Monument could fit inside!

An architect's childhood fantasy treehouse made real.

A beautiful geyser under environmental threat.

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

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

When ecosystems collide in the arid Southwest.

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

A multi-storied adobe complex has been inhabited for more than a thousand years.