These markers are used to document elevation changes around the famed dam.

This Prescott institution is widely considered the oldest bar in Arizona.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

The eroded core of an ancient volcano is now accessible by a short hike.

An incredible airplane graveyard sits outside this small museum dedicated to preserving aviation history.

One of the largest, oldest, darkest, quietest motel rooms in the world.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The unusual patterns in this rock formation result from two distinct modes of weathering.

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

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This unique art installation used boiler tubes from a decommissioned power plant to resemble Antelope Canyon.

These mid-century motels once housed the workers who built the Glen Canyon Dam.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

Let Ouray’s tallest waterfall sweep your breath away on a dealer’s choice of scenic hikes.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

Take a dip in the world's largest mineral hot springs pool.

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

Whether or not you take the 72-ounce steak challenge, there’s plenty of history, fun and Texas-style food at this legendary stop along Route 66.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Less a museum than a bizarre fantasy world created by artists and engineers.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

The world's second largest rocking chair is found on Route 66 in Cuba... Missouri.