Benicia Yacht Club and Marina
I'll be the first to admit that I am no sailor. In my twenties I had a roomate that owned a catamoran and we did go sailing on weekends, though our form of sailing generally involved a BBQ attached to the railing and an adult refreshment or two.
However, limited sailing experience aside, I can still enjoy a stroll along the Benicia Marina and past the Yacht club. In fact, anyone can enjoy this location for walking, biking, "wheelchairing" (I don't think that's an actual word), or however else you prefer to mosey along and enjoy a summer day.
There is a great public sidewalk that runs along the Benicia Marina and past green spaces, benches, the Benicia Yacht Club and by local condos that enjoy great views. In fact, when I was there recently, I was treated to seeing a youth sailing class. I hadn't know that such classes exist, but they do and they're almost as fun to watch as they are for the kids to participate in.
Not far from all of this is the foot of First Street with it's restaurants and numerous other attractions. So, add the Benicia Marina to your list of attractions that make Benicia a great place to live.