That looks like a place name sign. A road sign.
The valid ones in that shape are changeable message boards - where people go to post and read events are coming up, alerts for missing dogs, public health reminders, etc. At a park, it might list what sections of trail are currently flooded, or what insect is active and how to avoid it. Maybe what fish are in season. And so on.
You’ll need to explain people go to that sign to explore it. If it’s iconic, maybe it’s on the town website you could link?
Mentioning what’s nearby doesn’t help. They should be nominated on their own merit (winery, restaurant).