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In Pictures: 10 cool and useful Google Maps mashup...
Find a Hotel Using Isochrones
The Google Maps Hotel Finder experiment uses public-transport travel times to generate isochrones maps that will help you find a hotel within a certain traveling distance (either on-foot or by public transport) of your desired hotspot. A slider lets you control the travel time, and you can fine-tune your search for the perfect room by specifying a star rating and a price per night.
In Pictures: 10 cool and useful Google Maps mashups