After this former brothel closed, its interior remained almost frozen in time.

The mayor made the declaration in 2004.

A wild west land agreement was etched right onto this historic Idaho stone.

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

Spectacular views await visitors to this lake.

The only road through the heart of Glacier National Park.

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

A beautiful geyser under environmental threat.

This archaeological dig site and museum is home to one of the largest dinosaur fossil collections in the world.

Cabins once lived in by Butch Cassidy and the Sundance Kid are featured at this Old West living history museum.

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

One man's ambition created this psychedelic log home.

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

An architect's childhood fantasy treehouse made real.

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.

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.

"The Most Boring Road in the State."

The largest source of fossilized insects anywhere.

Meet Rita the Rock Planter, one of Danish sculptor Thomas Dambo's enormous wooden trolls.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

This cliffside memorial marks the final resting place of a lonely violinist.

An experimental, automotive replica of Stonehenge.

This erect, phallic geological spire wasn't always named so domestically.