This 5 minute tutorial shows how to use Microsoft Bing Maps to view panoramas from around the world created with Microsoft Photosynth.
Are you a local expert? Add detail to the places you know using Google Map Maker, now available for the United States. See mapping around the world happening right now at mapmaker.google.com or start mapping at mapmaker.google.com.
This is where Bing Maps does all of its processing of petabytes of mapping data that comes in from around the world.