Head out on a scavenger hunt to get to know the city on the Vltava in a very special way.  Start your Old Town route hunt on Wenceslas Square at the well-known equestrian monument. Afterwards, the puzzle enthusiasts will discover the parish hall with the neighboring Powder Tower. The Tyn Church and the Church of St. Nicholas on the Old Town Square are part of the treasure hunt through Prague's Old Town. Of course, you should not miss the Old Town Hall with the impressive Astronomical Clock. Continue through the Jewish Quarter to the Rudolfinum on the Vltava, where the Prague Philharmonic is located. Over the Charles Bridge, reach the Little Side of the River, where you can explore the John Lennon Wall, the second St. Nicholas Church and the Prague Castle. Incidentally, this is probably the longest castle in Europe. Also included are the St. Vitus Cathedral in the castle grounds and the Golden Lane, where Franz Kafka once lived.