Gelnhausen has about 21,000 inhabitants. It's 50 km east of Frankfurt and about 50 km west of Fulda.
There is an annual festival called the "Schelmenmarkt" (Scoundrels' Market). It features some rides such as a roller coaster and two or three carousels. This is probably a good occasion to get to see the town at its best.
Gelnhausen has a surprisingly wide range of restaurants. The Italian 'Sardina' is good for pasta, pizza, etc.
Schelm von Bergen, in the Obermarkt, or "Upper Market", of Gelnhausen offers amazing traditional German food, with a gourmet twist. Schnitzel and Käsespatzle are probably the best two items on the menu, but there's nothing subpar about the food at this atmospheric venue.
As in most towns around Frankfurt you will have no difficulties finding the famous Ebbelwei (apple wine).
right across the trainstation there are 3 pubs the lorbas is the most popular one around young adults they play rock and stuff like that a must see i used to love it