Unable to answer "What kind of building is this?" for way/361928239 via StreetComplete 37.1:

could be a lifeguard tower. maybe no longer in use.

Attached photo(s):
https://westnordost.de/p/69439.jpg

Unable to answer "What kind of building is this?" for way/203946160 via StreetComplete 37.1:

Bauruine