Woke up early and walked back to the Prague Castle.  Very different during the day - mobs of people everywhere!  We tried to latch on to a group, but there were too many going on.  Bypassed going inside the Castle as the lines were ridiculous and started our walk to the old town square.  On the way the road we were supposed to take was under construction (story of our trip - but really why is everything under construction?!?!)  and it took us a good 30 minutes to get back on track.  Made it to old square and lucked out by finding a free tour - it turned out to be a fantastic 3 hour tour!  Afterwards we did some more walking around on our own and visited the new Communism Museum - which was great except I was so tired I was falling asleep in the movie area....  Made it back to our Couch Surfing friends house - fairly tired from all the walking.  They were so nice and cooked us a typical Czech meal - potato dumplings, pork and cabbage.  Was really good!  Have an early day tomorrow with a lot of driving involved - making the trek to Denmark.  Only 3 more days to go - can't believe it?!