The Grüne Graben in the Erzgebirge is an artificial trench of 8km in length, built in the 17th century on the mountainside above the Schwarze Pockau. There you can walk along wonderfully pleasant when the temperatures are very warm.
Nice to see, but the last storm left its mark
It is reminiscent of the Waalwege in South Tyrol and is a super nice hike.
Impressive watercourse can be seen here.