Next month I have a 7 hour layover at FRA. I am flying ORD-FRA arriving at ~9am and am departing at ~4pm FRA-CPT.
I would like to take the S-bahn into the city for a few hours to check it out.
I've never been to Germany before.
Any suggestions on the best S-bahn stop to get off at and what I should do/eat/drink/see?
Thanks in advance