The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

When ecosystems collide in the arid Southwest.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

Curious rock formations in a tiny Kansas state park.

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

Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

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

A tunnel with windows, so you don't miss out on the impressive views.

A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.

Largest collection of mounted dinosaur specimens in the world.

The sign to a demolished amusement park now stands in front of a local library.

The young Black revolutionary was killed before getting to see a non-segregated pool in his hometown.

The carved remains of a 200-year-old oak tree memorialize the namesake of the iconic "Wizard of Oz" character.

The only place in America where anyone who wants can shovel coal aboard an antique train.

A Chicago Movie Palace Lost to Time.

Where dioramas can follow you home.

This deceivingly ordinary warehouse hides an enormous collection of pop culture treasures.

The first and only museum dedicated to stained glass and horology opened outside of Chicago in 2017.

Planes, trains, and automobiles have all been sunk as attractions at this Illinois diving spot.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.