Thankfully, it is only a copy of the Eiffel tower in Paris. Therefore it is not as high and there are fewer stairs to climb. I did not take the elevator as it is tiny and there was a queue. The view from the tower is lovely, you can see the old town and the Hradcany with the prominent St.Vitus cathedral.
It is good to take the path to the Strahov monastery from this petrin tower.