Built around 1845, this house was occupied for 100 years, serving as a home to a prosecuting attorney, a Union Civil War general, and a wealthy socialite.

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

A small wall and marker are all that remain of this historic canal tunnel.

One of Cincinnati's greatest fighters once trained at a now defunct gym in this Over-The-Rhine neighborhood.

How did a massive marine arthropod find its way to landlocked Ohio?

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

The former broadcast site has been reimagined as a museum about the medium.

This bridge uses an inverted bowstring truss and is believed to be the only of its kind in the United States.

This moving cemetery sphere is a slowly rolling stone.

Now in disrepair, this 19th century station was a stop on of the famed B&O Railroad.

The inventor of the iconic Pringles can was so proud of his invention he was buried in one.

For decades, this waterfall remained hidden because of an artificial dam.

Inside, ancient treasures. Outside, modern contradictions.

Mussolini gave Cincinnati a bronze statue of Romulus and Remus suckling at a wolf's teats.

The largest ancient burial mound in Ohio.

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

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

This magnificent Cincinnati graveyard is also a popular public park.

A miniature world of concrete and stone in Springfield, Ohio.

An abandoned asylum incorporated into a college campus.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

A castle built by an eccentric medieval enthusiast in rural Ohio.