Before its closure in 2002, this South Dakota mine was the largest and deepest gold mine in Western Hemisphere.

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

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

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

A fitting attraction for the corn capital of the world.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

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

The drama of nature in full effect in this Nevada State Park.

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

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

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

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

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

Most-visited and most-photographed slot canyon in the American Southwest.

A spiritual vortex among the red rocks in Sedona.

Once disputed as the largest sundial in the world.

This 39-foot-tall version of a Hopi figure stands in Arizona.

This massive airship factory is so large that it has its own indoor weather.

For decades, this waterfall remained hidden because of an artificial dam.

Memorials and tributes scattered across the university grounds remember a famous national tragedy of the Nixon era.

This monument is dedicated to those lost on June 6, 1944, in the town with that day’s highest per-capita casualty rate.

This bar hosts an ever-evolving napkin art installation devoted to an American president.

A statue honoring 44 continuous years of greeting passing ships.