Here are two unusual places to visit in Ohio.
Materials Park /Headquarters of ASM International
The ASM International Headquarters and Geodesic Dome, at the Materials Park. This building is at 9639 Kinsman Rd, Novelty, OH. This is an office building, but one can walk around the grounds. The grounds are open to the public during business hours, the building is not. So this place might not always be open. The dome is great to look and the grounds are well taken care of. Inside of the dome is a garden with different types of materials and some information about them.
The castle is located at Glamorgan St. in Alliance, OH. This castle looking building is property of the Alliance School District. They might offer tours, but we did not try. Just a few blocks away is the Feline Historical Museum
We did not go into either building. This is mostly because they were not really open to the public type of place. These are two places that are great to see even if you can not go inside.