Hello Yurii! 
I think my translation program let me down a bit in my last comment. According to Wikipedia, there is an amphitheater at the notice. Will add it when I get the chance.
Quote Wikipedia: "Due to the newer development, the park tapers eastwards and ends in a roundabout with the so-called amphitheatre, an open-air stage on the Węgliniec–Görlitz railway."

https://de.m.wikipedia.org/wiki/Park_Paderewskiego

Greetings