"Es handelt sich jetzt um eine bewachsene Sumpflandschaft"
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2026-05-27T00:05:23Z
POI name: Marais
POI types: natural-water
#organicmaps android 2026.05.27-11-FDroid