Santa Monica's Douglas Park used to be a reservoir, and if you're not looking closely you may not see the playground beyond the bocce grounds. The park, which is the size of a city block, is filled with ponds and streams. The playground caters to the little kid crowd. It's surrounded by sand and the playground equipment includes everything from tire swings and seesaws to climbing structures. The playground also has a large open space used for skate boarding, bike or tricycle riding in the winter and a water park in the summer months.