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

An entire city block built completely out of petrified wood.

A fitting attraction for the corn capital of the world.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

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

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.

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

A roadside collection of over-sized iron creations that are a bit more macabre than most.

Just a man taking his prehistoric pet for a stroll.

The massive machine creates cracking displays of indoor lightning.

From bench to vandalism to art, this silly prank seat was funny enough to become permanent.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

A dazzling display of red rocks weathered into spires and hoodoos.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

A proto micro-nation sometimes populated by artists, surrounded on all sides by a Utah most barren.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

The largest outdoor art gallery in the Northwest United States.

This pop-culture shop also offers the chance to become part of their favorite tv show or movie.

This work of art by Matthew Mazzotta resides in this park dedicated to the first black legislator in Idaho.

The site of Paul Revere's historic two lantern warning.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

An enormous, inside-out glass globe built in 1935.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.