Contains a wealth of information about the first exploration and later use of the Green and Colorado Rivers.

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

Dubbed the "Blade Runner dragon," this buzzing neon sign is a beloved local icon.

The fifth-longest natural arch in the world, and the longest outside China.

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

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

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

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

This geothermal hot spring hides beneath a slowly growing mineral dome.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

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

A beautiful geyser under environmental threat.

A small flooded ghost town with a few scattered structures remaining.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

Home to the deepest rift anywhere on Earth.

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

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

Largest collection of mounted dinosaur specimens in the world.

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

Jurassic Park—A Still Life.

Largest man-made excavation on earth!