One of my favorite places in San Diego to go for a walk is Mission Bay Park.
Mission Bay Park is the largest man-made water park in the nation, and the ninth largest municipally owned park. Interestingly, San Diego also has the largest municipally owned park: Balboa Park.
Following are a few pictures from my most recent walk in Mission Bay Park a few days ago. I was over near the skyscraper hotel at the left side of the picture above. The hotel, a Hilton, is in one of the pictures below, and the bridge pictures below are under the long bridge in the upper center of the picture near the hotel.
Along with the San Diego Zoo and Safari Park, I can highly recommend Mission Bay Park as a way to spend a day in San Diego.