Fudge is the Cornerstone!
https://www.smithsonianmag.com/smart-news/why-does-every-tourist-attraction-sell-fudge-180963152/
"...Why fudge? In the normal course of things, fudge is… just another confection. It’s not as ubiquitous as, say, a chocolate bar. And yet, writes Robert Reid for National Geographic, “at least in America, wherever you roam, you can only go to one of two kinds of destinations: those with fudge, and those without.” Fudge is the best indicator of whether or not something is actually a tourist attraction, he writes. ..."