Is this a motorcross racetrack?

Here are a lot of lines without any tags - can someone fix this?

Is here really water?

Hello, does this ALDI still exist? Or is the store closed?

Hello, is there a mobile communication antenna on the roof? Or on the roof of another nearby building?

Here houses that need to be remapped and their adresses checked.

This landuse tag is quite strange, since it says "landuse=*". Can someone correct this tag to something meaningful?

Hello, is here a mobile communication antenna on this roof? Or on a roof close to this location?

Hello, is here a Netto supermarket? This Netto should registered in wikidata under Q552652, right?

Hi, is there an antenna or a mast on this roof for mobile communication?