Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

A waterfall and cave near Arroyo Seco that inspired the writings of D. H. Lawrence, Willa Cather, and Mabel Dodge Luhan.

This spectacular track has run continuously since 1882.

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

This unassuming layer of clay boasts an out-of-this-world origin story.

A unique arch graces the Dolores River Canyon near the Hanging Flume.

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.

Only a few signs remain of the buried Colorado mining town that supplied the uranium for the first atomic bomb.

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

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

It would be easy to walk past this unusual piece of art and have no idea it pays tribute to the odd life of a real chicken.

Two creeks flow out of either end of this canyon in opposite directions.

This shrine is an ode to the region's rich Hispanic heritage.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

This erect, phallic geological spire wasn't always named so domestically.

The site of a minor battle might have been forgotten if not for one participant’s famous family and the death of a respected warrior.

The site of the gruesome massacre—and maybe cannibalism—of five men, a tragedy that made Alferd Packer infamous.

This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

The temporary burial site of the man who shot and killed Jesse James.

Take a self-guided tour through one of Colorado's most elevated mining districts.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.