4. The Thing?: Benson, Arizona

Publications International, Ltd.
This billboard beckons travelers to find out just what The Thing? is. A store in Benson, Ariz., supposedly has the answer.

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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