The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

A classic advertising icon immortalized in regal bronze.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

No one knows exactly how deep the world’s deepest geothermal hot spring is.

A mural of the Virgin of Guadalupe painted on the rock wall by canyon's religious namesake.

Historic, 19th-century wagon wheel ruts cut into soft volcanic ash.

A 19th-century relic of timekeeping.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

This Chinese-style quartz sundial was saved in its final hour.

A memorial dedicated to the victims of the Columbine High School shootings.

Final resting place of a 19th century gold prospector and convicted cannibal.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

A home covered with elaborate mosaic and other pieces of art.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

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

A beautiful combination of living flora with preserved bones covers the shelves of this shop.

This sidewalk tribute honors Colorado's great culinary creation.

The highest point in Washington state is a volcano covered in glaciers.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

This simple badlands butte is the highest point in North Dakota and may be the only high point to charge admission.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.

This massive home was constructed by one of the greatest conservationists in Colorado history.