Map: https://goo.gl/maps/BCFRnD6knCeAgyKf7
How to get there:
Public transport: from Frankfurt Hauptbahnhof take the S6 (direction Friedberg) to Bad Vilbel, then bus no 551 (towards Neu-Isenburg-Gravenbruch) to Nordring, from there you walk for approx 7 Mins
https://www.rmv.de/auskunft/bin/jp/query.exe/dn?ld=14.205...