Hello all, first time posting here. I will be travelling through Frankfurt twice this summer, both times just a one-day layover. I'm very interest in spending one of those days birding and am curious as to my choices. I would like to find something like a park or other natural area that I can access easily by cab from the airport and spend a few hours birding. Does anyone have any experience or suggestions that might be of assistance? Alternatively, any other nature-related sights or destinations that I should consider? Any suggestions would be appreciated.