A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

Once named the “world’s oldest gas station” due to its unusual construction material.

The highest point in Oklahoma used to be a lawless outlaw's paradise.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

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

The hallowed remains of a 900-year old Ancestral Pueblo great house.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

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