The first declared National Monument in the United States.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

The world's largest Holstein cow.

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

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.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

A wall of chewing gum moonlights as collective art.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

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

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

Less a museum than a bizarre fantasy world created by artists and engineers.

The world's longest known cave system.

This replica of the Greek structure is in the heart of Nashville.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The unbelievably opulent home built for an infamous newspaperman.

A bomb shelter and some fireplaces are all that remain of the house Fred Roberts tried so hard to keep standing.

Thousands of turbines whir at at the origin of North American wind power.

A remote crossroads honoring a fallen talent.

Quite simply the largest tree in the world (by volume).

Come for the speed, leave in love with the desert.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.