Nicknamed the "Glory Hole" by locals....
Now, why would a friend find this post card and send it to me saying, "thinking of you"??
Apparently, Lake Berryessa lies in the easternmost Northern California Coast Ranges' foothills. It is an artificial reservoir capped by Monticello Dam, and from time to time it needs help with the overflow. The overflow outlet for Lake Berryessa has been nicknamed the "Glory Hole" by locals