The only road through the heart of Glacier National Park.

Spectacular views await visitors to this lake.

An entire town preserved as a historic landmark.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A 6-mile-long lake created by an apocalyptic seismic event and the deadly chain reaction that ensued.

The tallest dam in Montana and top 10 in the country.

Crystal clear, drinkable mountain spring water by the side of the road.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

This steep-walled ravine contains animal-shaped formations made from sandstone.

The first declared National Monument in the United States.

An antique Beechcraft airplane serves as a giant windsock for people driving through the blustery open country of eastern Wyoming.

Before its closure in 2002, this South Dakota mine was the largest and deepest gold mine in Western Hemisphere.

A cemetery housing wild west legends in South Dakota.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This towering wooden Sasquatch was carved with a chainsaw.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

One man's ambition created this psychedelic log home.

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

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

The source of America's longest river is also a historical landmark and the start of a famous nude run.