Germany has taken some serious “renaturation” steps to fix the grave errors done since the 1940s to 1980s where they straightened rivers and dried up a lot of land. E.g. at all of Altmühl’s weirs they dug a little creek around it to enable fish to migrate or sometimes even bigger projects like this one:

https://maps.app.goo.gl/yTYY9TDoMbmgHsGo7 The EU however to this day pays subsidies if you drain your land which is just beyond stupid.