A must see. Also - a nice little quirk if you have a mobile device (iPhone etc.) - you can tilt your device and the panorama will follow your motions, as if to emulate you sitting on top of the buggy and moving your head around. Very neat.
360cities.net is also just a great interactive panorama site in general. I try and make my own panormas using Microsoft’s ‘photosynth’ app on my iPhone. It does a pretty good job too, I’d recommend it.