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

A shady solar power system that couldn't hold up to the harsh desert conditions.

Rippling sand dunes frozen in the Arizona rock.

Dig for your own trilobites in this goldmine of invertebrates.

Jurassic Park—A Still Life.

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

Dramatic river bend surrounds a natural red-rocked pedestal.

This granite monument at the site of an ill-conceived tourist attraction is built from the same stone as the Mormon Temple.

Visitors to this library are in for a real-world education in modernist architecture.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

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

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Largest collection of mounted dinosaur specimens in the world.

The remains of this early 20th century refinery loom on a mountainside like a graffiti-covered fortress.

This abandoned bootleg attraction was built to cash in on the popularity of classic TV show, F Troop.

Despite sitting firmly in the global cradle of the Church of Jesus Christ of Latter-day Saints, this Hare Krishna temple is host to one of the largest color festivals outside India.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

A unique geological area spiked with wind-carved rocks that resemble teepees.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

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

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.