Eons ago, a rushing lava river formed this pristine passage through solid rock.

This Native American settlement dates back to the Pueblo II period.

This small interfaith chapel lies not far from the rim of the Grand Canyon.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

A late-19th century diversion canal built by hand crosses Bryce Canyon National Park and is still in use.

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

Come for the speed, leave in love with the desert.

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

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

Roaming bison and a spectacular view at the highest point in Nebraska.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

Jurassic Park—A Still Life.

The last SR-71 ever constructed.

The largest island on the great salt lake is home to curious creatures and strange stories.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

The oldest extant wooden jail in South Dakota and possibly the United States. 

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

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

A cemetery housing wild west legends in South Dakota.

This vintage train once gave new meaning to “swimming upstream.”

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

South Dakota's oldest operating brewery is housed inside a historic firehouse.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.