Here is a sign, something like "the road is unpassable by bicycle in ~350 meters" (to the north). I didn't check and just returned back.

Requires to re-check and fix tags of the road, for example add highway=construction for a piece of road.

No road here. Or maybe there was a road, but now there is a water stream.

Temporary change: changeset/158037124

Requires re-check, better from Aleja Zwycięstwa, and delete tag highway=path.

Weird asphalt highway=track with good smoothness. It is probably not a track.

Is there an amusement park? Or maybe just an outdoor seating + a big playground?

Is there a post box inside? It is visible on https://domslaski.pl/img/images/jedzenie/sala-domslaskii-18.jpg

Probably duplicating defibrillator, someone need to check it on site

Как называется памятник?