Petaluma is one of those few American cities that has a major river running through it that provides access to and from the ocean. It enabled Petaluma to become an important city in the early days of California. The main section of town is comprised of numerous historic buildings. Many of them are visible in this photograph. The bridge you see in the photo is for foot traffic only. The Riverfront Art Gallery, of which I am a member, is the cream-colored two-story building visible just above the right end of the bridge.