An abandoned, rusty old relic of railroad history stands at attention over the Cuyahoga River.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

The "Seinfeld" diner.

The Hollywood home of Kermit the Frog and Yoda used to be Charlie Chaplin's film studio.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

A historic coal mine that doubles as a museum and tourist attraction.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

The only subway station in the city that still makes use of gap fillers.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A few iconic structures are all that remain of America’s first outdoor shopping mall.

The decor of this Hollywood movie palace just barely predated the opening of King Tut's tomb.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Three vintage horses survived a 1976 inferno and found a home on a sister carousel.

Sit at the "Disney table,” where Walt and his team of "imagineers" once dined on the regular.

Home to several unusual artifacts, including a huge painting of George Washington.

At the center of this cemetery stands a 2,000-year-old burial mound of the Adena culture.

One of the few places where you can explore a 1918 paddlewheel steamboat from stem to stern.

The mounds at this site were reconstructed with the help of archaeologists and historians.

In the parking lot of a fast food restaurant, a statue memorializing a prolific bull elephant.