Adjustable beds. Beer. RVs. Cigars. Cheescakes. If something is made in this country, chances are you can witness the process. The field’s main guidebook, Watch it Made in the U.S.A., includes more than 300 factory tours and company museums scattered across the country. Nobody ever really plans a vacation around a factory tour the way they do around, say, a national park or a battlefiled or a museum. But when you see a factory tour advertised on a highway sign, or in a brochure on a rest stop rack, you realize that you never really wondered how a guitar was made, but now that you think about it…

Jesse Smith is a writer based in Philadelphia.