This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This rustic old building is said to be the most photographed barn in America.

No Gordon Lightfoot song, only a barebones monument to greed.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

A rapidly disappearing glacier filled with extinct grasshoppers, perfectly preserved in the ice.

The highest point in Montana is as rugged and singular as the state itself.

Native Americans built this circle of stones, which was used to predict astronomical events.

Operational for less than a year, this mill produced more than 11,000 tons of chrome concentrate in its short lifespan.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

This museum details the history of a local miracle: The return of the critically endangered black-footed ferret, which was once believed to be extinct.

One man's ambition created this psychedelic log home.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

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

These markers are used to determine the ground stability of the Strip.

Once disputed as the largest sundial in the world.

An unusual geological feature towers over the remains of a dark episode in United States history.

At the time of its completion, it was the tallest dam in the world.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

Stairs often replace streets on the steep slopes of this old mining town.