If you live in the States, you’re probably familiar with Knott’s Berry preserves. This brand of jams/jellies/preserves is fairly-prevident on out supermarket shelves, eclipsed, perhaps, only by Smuckers.
And, if you’re super-aware, you might know that Knott’s operates a theme park in California, just down the road from Disneyland, named, appropriately, Knott’s Berry Farms.
Knott’s Berry Farms was started as a simple berry stand in the 1920s in Buena Park, California, by Walter Knott (who, incidentally, engineered the boysenberry, or, as it was called in my family, the “poisonberry”) and grew from there to be a full-fledged amusement park by the 1940s (prior to Uncle Walt building his magical kingdom up the road in Anaheim).
While I’ve never had the pleasure of visiting Knott’s Berry Farm, my father had the opportunity sometime in the late 1950s/early 1960s, judging by the ticket for the Calico Mine that I found in his archives.
Be sure to visit the “Glory Hole”.