We passed by from Rotenberg to Frankfurt and came in to see the city. Since we didn't know more in advance, we drove directly to the city center. The parking fee is a bit hard, although the roadside can be parked, but there are really few vacancies. The machine that pays the parking fee can only receive the right coins, but fortunately a local uncle gave us a dollar coin. The square is very large, surrounded by historical buildings and various shops, which can be spent for half a day.