A mindblowing site, showing what HTML5 can do. Combined with images from Google Street View and Google Maps, The Wilderness Downtown puts you through a fascinating interactive journey. Enjoy it (with Google Chrome)!
If you want to check out more experimental sites like this one, developed with the latest web technologies including HTML5 Canvas and SVG, be sure to check out Chrome Experiments, perhaps needless to say, but I'm going to say it anyway, using Chrome as a browser. It's worth having a look, because these technologies are the future of interactive websites, and will completely blow Flash and Silverlight away in a couple of years.