Cobble-stones in Prague

I've been running around Prague for a few long work-days. It's been a nice journalist conference about the future of newspapers etc etc. The city offers beautiful architecture, sunlight, crystal glass and blah blah. But what I noticed the most, is the great cobble-stoned streets. So it's no biggie if you forget to look up at the grand buildings from way way back. Where you place your feet is as amazing :)