Hand-craft installation in nature

Hi,

somebody set up a lot of wooden mills in the woods and that became a kind of tourist attraction. See some pictures here: https://domzalec.si/vrteci-se-mlincki-pri-mrzlem-studencu/

Somebody put the POI on the map and tagged it as: name=Mlinčki tourism=attraction

However, osmose throws an error: missing tag incomplete object: only name and tourism=attraction

What to put more, I can not find a reasonable tag for this thing.

Thank you,

Peter