The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

A sculpture for the sun and stars, created by Nancy Holt.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

A popular rock that acted as a waymarker for American pioneers.

America's largest man-made forest was planted in an effort to bring back the past.

Inside this striking glass building, visitors can see thousands of dinosaur fossils in the positions that nature deposited them more than 150 million years ago.

Every president in history is immortalized in bronze in downtown Rapid City.

A cemetery housing wild west legends in South Dakota.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

The highest bridge in America was built for an almost unnervingly small amount of money.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

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

One of the first intercontinental ballistic missile sites in the United States.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

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

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

One Confederate statue that accurately reflects the ugliness of its subject.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

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

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.