I will be in Frankfurt, Germany three days prior to joining up with a group, and would like suggestions as to best/most interesting Day Trip out of Frankfurt. I will already have travelled to Heidelberg, which is great, but need ideas for other stellar, rather 'near' destinations so that I might see as much as possible in the 3-4 days prior to July 25th, that I can manage. Thanks for all ideas!
you can visit wurzburg - it has a castle on the hill and a small palace. a little bit of walk between the 2 can see the downtown area. it's a little nice town for a walk.
I hope that you have planned some time to spend seeing Frankfurt? While there, do go to Höchst, Bornheim, and Sachsenhausen. I have plenty of suggestions for Frankfurt
For day trips though:
Bad Homburg (the Saalburg, Hessen Park)
Kronburg (castle built in the 1200's, nice Alt Stadt)
Büdingen (wonderful old castle with walls and dry moat)
Marburg (beautiful old university town)
Seligenstadt (began by one of the daughters of Charlamagne when she ran away from the palace in Frankfurt in 794)
Darmstadt (great museums and parks)
Mainz (Dom, Chagall windows in St.Stephens, Isis temple ruins)