A commemoration of over 150 of St. Louis's favorite sons and daughters.

Stand at the point where the two mightiest rivers in the United States converge.

An average of 33 million gallons of water pour out of the collapsed cave at the heart of this spherical spring.

The deepest spring in Missouri.

This otherworldly church spire reaches up toward the heavens.

An abandoned factory along the Mississippi coated by a giant mural.

A museum chronicling pioneer life constructed over Interstate 80.

The last SR-71 ever constructed.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

Largest man-made excavation on earth!

Located inside a former bread factory, this museum explores a century of transportation history through innovations that were extraordinary or failures—sometimes both.

A chapel built by Italian POWs during World War II tells a forgotten tale of the war on the home front.

Twice a year, this road is closed off to allow for the migration of thousands of snakes, reptiles and amphibians between cliffs and a swamp.

Now nearly abandoned, Kaskaskia was once the capital of Illinois and one of the most important towns on the upper Mississippi.

The hometown of Popeye's creator is littered with a growing collection of granite cartoon characters.

Man-made geyser that rises to the exact height of the Gateway Arch.

An abandoned meat mecca now serves as an excellent locale for urban exploration.

A notorious Route 66 eatery once frequented by Al Capone.

Tiny treasures, giant murals, and strange sculptures decorate the windows and doors of this abandoned building.

Though it's thrived abroad, this forgotten Dunkin' rival has just one store left in the States.

First known as the "Sample House," this construction mash-up was meant to be a living catalogue of building styles.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

A floating museum that was sunk by a flood and left to rot in the tides.

The eccentric and colorful pavilions of Tower Grove park are a beloved and overlooked symbol.