We visited the Struwwelpeter biergarten on a hot day at the end of May 2018 when we were spending the night in Frankfurt near the Frankfurt Hauptbahnhof (main train station). Short taxi ride to this nice biergarten in the Sachsenhausen area across the Main river. Map shows location above. We had some great food and beer. Definitely a must if you are looking for a great biergarten, apfelwein, local pork dishes and great beer. Check out their website for more info: https://www.struwwelpeter-frankfurt.de/index.html