There are eight natural springs around town, each with a slightly different taste.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

A historic and oft-filmed prison stands in a Chicago suburb.

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

One of the world's earliest skyscrapers.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

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

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

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

This water tower has been a staple of the Rochester skyline since 1931.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

At a mile long, the Fort Madison Bridge is the largest double-decker swing-span bridge in the world.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

A world-class observatory in the California desert.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

Dakota legend claims this locally iconic pinnacle was once part of a sacred burial site that was cleaved in two.

An amazing collection of sculptures and art.