This secluded walking trail is a hidden gem of a Pittsburgh park.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

A giant ball made from pieces of an old Jeep.

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

The secret city built by the Manhattan Project.

A big museum full of little worlds.

An extensive collection of fine art devoted to man's best friend.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

One man's unrequited love stands in a glass box forever.

A single handprint, which, according to Ohio State University legend, cannot be scrubbed off.

Just outside the Ohio Supreme Court sits a testament to justice.

Known locally as "the giant head," this 14-foot LED sculpture has a photo booth in the neck where you can have a 3D picture taken and displayed.

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

This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

A retro walk through the history of the tube.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

A real flying saucer, contracted by the U.S. Air Force.

An art deco ice cream shop covered in vintage train station tiles.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

Less a museum than a bizarre fantasy world created by artists and engineers.

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

If astronomy had a ghost, it would look like this observatory.