Fribourg (Freiburg in German, not to be confused with the Freiburg in Germany) is a nice little day trip, 2 hours by train from Zug with a change in Zürich. It is right on the German-French language border. They speak French in the Fribourg canton so you feel like you have actually traveled.
Fribourg has Cameron and my favorite cathedral. The Cathedral of St. Nicolas took almost 150 years to build and was completed in 1430. The tower was built in 1490 and you can climb all the way to the top of this 500 year old tower.
Be warned.. it is 368 steps. By the time I reached the top, I was about to keel over. That was some major exercise so pack some comfy walking shoes. Travel can actually be pretty good excercise and exhausting. You are definitely rewarded by the view.