The Summer in South-Western Germany is warm and slow. There’s a lot of nature and a lot of water. The old sidearms of the Rhine river between Karlsruhe and Basel are nature reserve and wild growing forests.
You can take your boat and start to explore the river and the forests. There’s even a long kayak route to travel. Sometimes you will pass by a little Marina where you can rest with a cool beer and some simple home made food...