I have this thing for honesty, so here it is.
The naked truth:
There are other spots for eclectic rock climbing in the city. But, the wall on the 50-meter-high flak tower at Esterházypark is definitely the one with the best view, plus has the most interesting history. Once you get to the higher part of the over 30 routes (even more inducement to finish instead of giving up halfway;) you can overlook surrounding districts, rooftops of houses and the upper parts of churches and cathedrals.
The climbing wall is closed in case of “stormy winds” and “crying heaven” plus when the sun goes down, you have to follow its direction. Trial lessons on application, don’t bother about having all the equipment on you, you can rent it there.
If you are with someone who’s not too much into climbing they can hang out in the park where they can watch you and other future ‘rockstars’ on the wall, or alternatively from above: the rooftop terrace cafe (ocean’sky) of Haus des Meeres is worth a visit.
Across the street, there’s the Apollo movie theater, architecturally interesting because of its many hallways, which easily make you mistake this building for a labyrinth.
No excuses: get there and get high!