Everyone ges to the Ratusz (City Hall) to watch the clock strike and the goats butt their heads together. Don't miss this but do pay the couple of zloty to go in side. It's a museum and art gallery and has some really interesting more recent history on the top floor. There are some good indications as to how the city looked over the centuries. Also nice to glance out of the windows to get a better view of the Rynek (Market Sq).