Unable to answer "What kind of building is this?" for https://osm.org/way/26912632 via StreetComplete 56.0:

Substation

Attached photo(s):
https://westnordost.de/p/193849.jpg
https://westnordost.de/p/193850.jpg
https://westnordost.de/p/193851.jpg
https://westnordost.de/p/193852.jpg
https://westnordost.de/p/193853.jpg