Though it's no longer a functioning train depot, this castle-like structure is an important piece of Oklahoma history.

This unusually circular centenarian barn became a Route 66 icon.

This little slice of old Jerusalem in Oklahoma is the evolution of a century-old passion play.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

The world's only museum devoted solely to the art and collection of action figures.

Circus cemetery for all the “showmen under God’s big top.”

A circus legend leaves an unexpected endowment.

The birthplace of Las Vegas is now preserved as a historic and natural area.

This arid landscape was once a lush wetland. Today, it's a paleontological site filled with fossilized mammoths, sabertooth cats, and more.

A giant open-air sculpture made of over 200 full-sized boats.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

This grimly-titled Texas cemetery is all that remains of a Wild West settlement with possibly the worst name.

The world's largest collection of autographed baseballs can be found at the St. Petersburg Museum of History.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

This phone booth-sized municipal building has been a piece of police property for more than half a century.

Tucked away in the forests of North Florida resides a 19th-century lighthouse.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

Shop for books in the New Orleans house where William Faulkner once lived.

This memorial and the seawall that it stands near are powerful symbols of the island’s resilience.

This memorial marks the devastating day that Texas City was destroyed in a daisy chain of exploding ships.

A small "palace" and museum made of, and devoted entirely, to salt.