I've never had such large prawns. We put them into our new paella pan, after marinating it in garlic, chilly and brandy.
The Rhine river dikes between Lohausen and Kaiserswerth are beautiful and a stop can be made at the Burghof next to the Charlemagne castle ruin.
I trained 6 weeks and ran to the Alster 4 times, each stretch is 5 km, every 2. day. In between only 10 km. It was fun, especially because the weather was great during the run. It took me 2:12 hours, with more than 10000 runners.