By boat on the Vltava River
As surprising you may find it, the boats that can be seen on Vltava are not just for short 
sailing tours around Prague greatest attractions but are used also as an alternative for travelling to some places around Prague.
In case you have an extra day in Prague, when you would rather sail somewhere than wander on foot around the old city, you could go a boat trip around Prague most beautiful sights around the Vltava bank offered by the Prague Sailing Corporation, dating from 1865 (you don’t have to be afraid that the boats are as old as the company).
For more pictures see Boats on the Vltava photo gallery