Google Maps Powered Street View of Liberty City (via GTANet)
Check out this impressive Google Maps powered version of Grand Theft Auto IV's Liberty City map from the folks at longstanding popular fan site GTANet.
Recently updated with a 3D street view mechanic (grab the pegman icon and drop him on the map to open it up), this map let's you explore the entirety of Liberty City, and also includes a navigation bar on the right side panel that overlays the locations of important items and locations.
For the maximum effect, be sure to toggle on the full-screen option in the upper right corner and maximize your browser. No doubt a lot of work went into creating this resource - props to the GTANet team from all of us here.