This remote river crossing was a popular campground on American westward expansion trails, and a former Pony Express station.

The world's largest mineral hot springs is home to a herd of bison, a free public bath house, beautiful mineral formations, and a terrifying swinging bridge.

This sandstone building is a relic of the Overland Trail.

Mark Twain once stopped at this rest station during his journey to Nevada.

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

Miraculous tree that seems to sprout out of solid rock.

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

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 oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

Neal Cassady may still have an open tab at one of Denver's oldest watering holes.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

“You better take care of me Lord, if you don't you're gonna have me on your hands.” ― Hunter S. Thompson, Fear and Loathing in Las Vegas.

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

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

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

A recreation of an Old West apothecary full of curios.

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

A collection of over 15,000 zines works to preserve DIY publishing culture.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.