I personally hate cities lacking a river. A river creates an essential axis of the city and brings a lot of other advantages. Such as nice bridges, islands… and the possibility to paddle-boat when the summer is fine. In the very center of Prague, at Žofín (just close to Smetanovo nábřeží – check the Smetanovo nábřeží article), you can rent one.
Renting a boat costs about CZK 150 – 200 for an hour which is fair enough if two or three people join you. It would not be much fun to go alone anyway… I would recommend going on a warm evening – they don’t close before nine if the weather is nice and there are much less people there then. You can paddle about 500 m up and down the stream and see the beautiful city centre from a slightly different perspective.
The paddle-boat is very easy to handle so you do not need to be worried that you will not manage. You can even have some sort of picnic there, just lie back, have a snack or glass of wine (which you can actually cool down in the water) and enjoy yourself…
We, locals, sometimes even go to study there, it is quiet and calming. They usually start operating by the beginning of May, very much depending on the weather.
Paddle boats at Vltava | Relaxing | Per hour from CZK 150
Depends on weather, can be until 23:00 in summer