Zoom in closer for a map of the clocks of Berlin, by Tagzania.
Tagzania allows geographic tagging, which means the tagging of cities and landscapes. That means shared, social maps. That means maps of Tokyo according to neoGoth teenagers and maps of London according to EMS drivers. Maps of industrial Liverpool according to local historians. Or maps of Salt Lake city according to each of these groups, their tags layered on top of each other.
Essentially, this means maps as they have never before been used: as shared technology, not merely the devices of trade and military and political interests. As a broadly-networked information-sharing device. Which implies all sorts of fun things for the cities of the future, where people, theoretically, should be able to find out about themselves and find out about the city with equal ease of exploration.