A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

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

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

The longest of the four remaining covered bridges in Missouri.

This marker identifies the location where three states converge.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The oldest extant wooden jail in South Dakota and possibly the United States. 

Abandoned businesses, homes, and rusted cars are all that remains of this stopover town.

A relic of roadside lore and perhaps the first of its kind in North America.

The man who was president for only one day and spent most of it asleep.

A mysterious and terrifying public art goblin seemingly meant to inspire local legend.

Winter and summer solstice aligned sculpture in the middle of nowhere.

Roaming bison and a spectacular view at the highest point in Nebraska.

The notorious couple camped at this site after a bloody shootout with police.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

A unique blue and yellow phone booth in America's "Little Sweden."

The cliff and rock formations are made out of Sioux Quartzite.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

The quirky collection includes treasures like Elvis' underwear, Bob Barker's toothbrush, and hundreds of sock monkeys.

This roadside park filled with unusual statues is on the grounds of an abandoned railway station.