While visiting Prague, Czech Republic a couple of years ago, we took a day trip to see this magnificent medieval city, designated as UNESCO World Heritage Site in 1992. I only wished we could have stayed overnight to walk around the old town at night, well, may be next time.
Stephen Hung Photography 
we stayed there one night, the night scene was quite nice. But we could hear steps on cobble stone all night long, especially ladies wearing boots or high heels. We got up early in the morning and the castle was covered by mist, it was quite a plasant morning walk. We met many tourists from Taiwan and China.
Thanks for your comments/input, Biing.