California View is a Google Map that displays California State Parks, fishing spots, and boating facilities. The points of interest for the map are taken from Data.ca.gov.
What I really like about this Google Map is the simple but effective user interface. On first visiting California View you are presented with a search box to enter your location. Once you have selected a location you are presented with a full screen map and a menu to select whether you want to view state parks, fishing spots and boating facilities on the map.
I suspect that the design was chosen so that the site works well on mobile applications but the simplicity of the user interface is something that a lot of map mashups could learn from.