You could take a quick look at the Wikipedia Entry:
If you should be in Freiburg, always find your way to Schallstadt ( which is in ~20 Minutes travel distance ) to
meet Frank at the BOETTCHEHOF - a small family - run distillery where really good Black Forest Liqours are made. Frank will happily explain the entire process and squeeze y' all into his century - old cellar and let you try the entire product range from pear liqour to the famous "Schwarzwälder Kirschwasser" a REALLY hard, 90 proof and up, clear liqour made from cherries.
Frank will explain in deep detail how his distillery works, and you'll have the chcnace to gain a "Schnaps Diplom" - a "diploma" for those who are eager on a deeper level of understanding how distilling fruits to liqour works.
Attached to the little "farm" is a good restaurant with good food, nice service and, of course, a small shop where you can buy the products; often the liqour bottles contain a whole fruit ( e. g. a whole pear ).
Check out www.boettchehof.de
In Freiburg they have something called a KONUS ticket which will allow you to use public transport in the freiburg region all the way down to even the town of Basel for FREE if you're with a host registered for that process ( nearly all good hotels are ). Car rental ( Sixt etc. ) is available.
You will want to REALLY make sure that you're familiar with winter conditions when hiring a car. Need automatic gearbox ? Please SAY so as most have manual 5/6 - Speed transmissions.
check out http://www.blackforest-tourism.com/
Any questions ?
Feel free to ask.