Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

This super steep hike ascends 2,000 feet in less than a mile.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

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

A little-known hot spring haven right below the highway.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

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

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

The same security that protects our nukes accidentally protected a gentle herd of antelope.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

The longest living non-clonal organisms on Earth.

Jurassic Park—A Still Life.

One of the largest, oldest, darkest, quietest motel rooms in the world.

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

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

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

Happen to come across a dead eagle? Send it to America's official dead eagle warehouse.