4. The Thing?: Benson, Arizona
Since 1965, for miles in either direction along I-10, billboards touting the mysterious "Thing?" barrage the road-tripper. What could it be?
Only those who stop at the curio store in Benson, Arizona, at exit 322 -- and pay the price of admission -- will know for sure, but rumor has it that the attraction does not quite live up to the memorable advertising.
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