It may just be a genius marketing stunt, but the flavor graveyard at Ben & Jerry's in Waterbury, Vermont, is also a sort of outdoor museum for the company's discontinued flavors. Each tombstone features a short epithet and the years each flavor was in production. Visitors can also visit the local factory for a small taste of the flavors that still live on to this day.
However, it never hurts to pay your respects while you're there. Especially if there's a particular flavor, you grew up with during your childhood that suddenly went missing one day.