An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

A sculpture for the sun and stars, created by Nancy Holt.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.

Population: 1.

Miraculous tree that seems to sprout out of solid rock.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

This UFO landing strip was created by a charitable Wyoming city that was worried about residents of Jupiter.

The final resting place of an outlaw, whose legend grew after death.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

This ancient trail has claimed the lives of over 2,000 people.

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

Once a year, at exactly 11:11 a.m., this monument comes to life.

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