Limestone caves with spectacular showcase chambers.

This historic national park is covered in the stunning ruins of red rock pueblos.

Miniature art that tells an enormous story.

A Saint Nicholas-themed ghost town in the Mojave desert.

Outsider Art Community.

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

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

See massive fossils that are over 200 million years old in northeastern Arizona.

A self-built castle made by a mysterious man.

A reproduction of earth's many biomes.

An homage to everyone's favorite prehistoric cartoon family.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

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

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

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

Incredible sculptures inspired by obscure passages from the Bible.

Largest man-made excavation on earth!

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

Step into the cool deep past and unknown future of who begat who.

Jurassic Park—A Still Life.

A ghost town that held steady longer than most, but finally gave up the ghost.

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