We list 31 museums and historic sites in Ohio that take a Time Travelers membership, across 27 towns and cities. The largest clusters are Cleveland, Wapakoneta and Granville.
Cleveland is the busiest single base: 3 of the 31 are within 25 miles of it, so one day out covers 10% of the state list. Another 15 sit more than 100 miles away, and the list spans about 225 miles end to end, so the rest is a second trip rather than a detour.
Because the benefit is built for travel, the states next door are usually where the card earns its keep.