After all that walking and shopping, it is time to relax, without missing the best part of Budapest: the Danube river cruises. You can carry on sightseeing with some nice cocktails in your hand. Lean back and enjoy the UNESCO World Heritage site, the castles and church es of Budapest lined up along the massive river Danube, which divides the city of Budapest into Buda with gentle hills and Pest with flats, bars and business life.