Arizona Mining and Mineral Museum

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The admission here is dirt cheap ($2, and no pun intended), so even if you're not that into geology, it's no hair off your back to spend an hour or two here. It's not the biggest space, but they manage to pack over 3,000 minerals, rocks, fossils and mining artifacts into the place. It also has a 206-pound fragment of Meteor Crater's meteorite, and outside there's a 43-foot tall Boras mine head frame.

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