The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

This Wyoming town is fascinated by a particular mythical creature.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

Miraculous tree that seems to sprout out of solid rock.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

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

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

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

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

A popular rock that acted as a waymarker for American pioneers.

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

One of the smallest towns in the United States.

An architect's childhood fantasy treehouse made real.

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

The first declared National Monument in the United States.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

The fifth-longest natural arch in the world, and the longest outside China.

Jurassic Park—A Still Life.

The largest island on the great salt lake is home to curious creatures and strange stories.