A house carved into a rock in the 1940s.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

A working ranch doubles as a sustainable hub for world-renowned classical music and large-scale sculptures.

Modeled after a famous church in Vienna, Austria—but in Helena, Montana.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

A collection of 16,000 antlers crammed beautifully into a small shed.

A collection of huge, site-specific sculptures sitting in the Montana woods.

The oldest badlands in North America, Makoshika State Park takes it name from the Lakota words for broken land.

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

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

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

New fungal and bacterial species call this deadly lake home.

This marker identifies the location where three states converge.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

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

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

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

Colorado's only true geyser is hidden within the San Juan National Forest.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

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.

This super steep hike ascends 2,000 feet in less than a mile.

Abandoned silver mine strewn with wrecked and twisted structures.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.