Ohio

Cincinnati Abandoned Subway

The Cincinnati Subway was a partially completed rapid transit system beneath the streets of Cincinnati, Ohio. Although the system only grew to a little over 2 miles in length, its derelict tunnels and stations make up the largest abandoned subway tunnel system in the United States

Weird Roadside Attraction

World’s largest rocking chair (Austinburg) …
Cornhenge (Dublin) …
Vasehenge (Zanesville) …
The Temple of Tolerance (Wapakoneta) …
The Wall of Gum (Greenville) …
World’s largest washboard (Logan) …
Hartman’s Rock Garden (Springfield) …
World’s largest basket (Newark)

Crystal Cave

Put-in-Bay, Ohio

Take a drunken tour inside the world’s largest known geode.

THE DIFFERENCE BETWEEN OHIO’S CRYSTAL cave and other, more mundane varieties may not be apparent—at first.

But in the Crystal Cave, you are not in fact inside a cave but wandering within a single rock: It is the world’s largest geode.