Yesterday we experienced a fabulous walking tour with Frankfurt on Foot. Hayden was a terrific guide; his background in history and the holocaust was evident in the way he discussed the sites we visited. Hayden is from New Zealand so no need to worry about understanding his English. So interesting. My husband and I learned a great deal and now have an appreciation for Frankfurt. The tour lasted about four hours, with a fair amount of walking and standing.
I also recommend visiting the Geothe Museum. The house and gardens are special.