You'll be stationed abroad between 1 year or 18 months depending on how much time you have in your enlistment. If you like the place, you can re-enlist in the Army and be asked to stationed there for another period of time. But have it in writing by personnel.
If you wanna know the sites, ride the train. Trains there are very punctual and very efficient. You can ride the train during weekends if you are not on duty. You can ride the trains from city to cities like Aschaffenburg, Wurzburg, Schweinfurt, Nurnberg, Heidelburg, Bamberg, etc. You can request a 3-day pass to travel to Paris, France. They have bus tours available to soldiers and American civilians alike.