There are a couple of spots on the Tenares to Gaspar Hernandez road but not a big deal. The views make up for it.
Any real tourist sites do not exist in SFM except for the Sendero de Cacao halfway towards Tenares and the hike up La Loma Quita Espuela. There are a few nice places to eat and there are a couple of stadiums for basketball and baseball when they are in season. The night life is pretty typical with the Casino at the nice hotel in town, a couple higher end clubs and everything in between. Things start pretty late so I tend not to participate in late night activities in town unless I have access to a car.
The central park is nice. I tend to spend most of my time when I am there learning as much as I can about cacao and chocolate, so it is a great place for me.