Discover prague on an open top bus tour of this beautiful city 48 hour unlimited travelticket explore old town the heart of prague with its well preserved13th century houses and churches here youll find the old town hall the municipal house and the estates theatre the old town square is home to the famous astronomical clock which draws onlookers who gather to observe the skeleton ringing the bell and the other figurines which appear when the bell chimes the hour a trumpeter sounds