Users of Google Maps and Bing Maps have enjoyed 3D imagery for a while now, and Nokia is now catching up with the launch of (admittedly very nice-looking) photorealistic 3D models of 20 metropolitan areas from across the globe.
On Maps.ovi.com/3d, you can now explore places in 3D in major cities like London, Barcelona, Los Angeles, Milan, New York, San Francisco and, of course, Helsinki.