Locals and Tourists is an interesting map-based visualization of photo data tracked through Flickr uploading activity, that illustrates hotspots within various popular cities for tourism (New York, Venice, Toronto etc.) and color-codes the geolocation from each with the following (taken from the Flickr set): Blue points on the map are pictures taken by locals (people who have taken pictures in this city dated over a range of a month or more). Red points are pictures taken by tourists (people who seem to be a local of a different city and who took pictures in this city for less than a month). Yellow points are pictures where it can’t be determined whether or not the photographer was a tourist (because they haven’t taken pictures anywhere for over a month). They are probably tourists but might just not post many pictures at all.
Chromaroma is an interesting game that allows London Underground riders to liven up their commutes by undertaking “missions” through an Oyster Card and Bike Key (not sure). Description from the website: “Using your Oyster Card and Bike Key, Chromaroma
lets you play the city as you travel. It tells you stories, gives you points, and visualises your movements on an interactive map of London.” It appears to have been built using Flex and AS3.