One of the courtyards at Krakow Castle (Wawel Castle). This is almost the only photograph that I managed to take of the castle since they would not let me shoot anywhere inside the buildings (and my camera does not even have a flash!). While the castle was interesting, it felt like the last outpost of communism. Everything was regulated as to where you can go, when you can go, how long you could be there etc. It was not the most tourist-friendly experience that I have ever had.
I am not sure if these guys are an official paid band or just buskers, but they were there all three times I was in the Prague Castle area. They are really good and sell their CD’s as well. I bet that if you visit the castle they were be there playing their tunes.
Update: here is a photo that my friend Hugh took of them in 2002, seems like they have been there for a while.