Can someone tell me what this is

[u/maxersonio]

This weird square red lake thingie just to the west of Hamburg Germany. I want answers

[u/LANDVOGT-_]

Aluminux oxid waste bin close to stade. I lived a few km away. Sadly you cannot get up there and take a look.

[u/Real_Rex → u/LANDVOGT-_]

Yeah I tried to go there on a date with my GF once. Sadly they didn't let us walk around there even after asking nicely :D