We list 16 museums and historic sites in Michigan that take a Time Travelers membership, across 15 towns and cities. The largest clusters are Muskegon, Ann Arbor and Canton Township.
Muskegon is the busiest single base: 2 of the 16 are within 25 miles of it, so one day out covers 13% of the state list. Another 12 sit more than 100 miles away, and the list spans about 188 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.