A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

Famously misunderstood wonder of the ancient world

The sign at the garden gate reads: “These Plants Can Kill.”

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.

Electrical pylon in the shape of Disney's beloved mouse.

Meet manatees face-to-face at this zoo for native species.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

The world's longest known cave system.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

This historic hotel invented the chocolate brownie.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

One of the oldest living oak trees in the Southeast.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

Paths are maintained, but trees have taken over plots.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

There aren't too many operational funiculars around, but Pittsburgh has two!