Next saturday I'll be in Frankfurt for 2 weeks vacation. Which places would you recommend to visit?

Well, you'll be right in the middle of Germany, which gives you a lot of choices. Since I'm from around there, I could recomend a lot of things, most of them I'd say are kind of historical. First place I would definitely advise you to go to would be W眉rzburg. Two castles to see, first the old castle, the "Festung Marienberg", which is from the middle ages. It features two museums and a restaurant (beautiful view over the city) and offers guided tours in English. The second castle actually features a UNESCO cultural heritage of the world, namely the biggest unsupported fresco on a ceiling, by one Tieppolo. This castle, called the "Residenz" also offers guided tours in English.
The city itself is very very pretty, with historic houses and churches and bridges, and lies in the heart of lower franconias' wine-country. Travelling there from Frankfurt, if you're going by car, you will also pass an outlet shopping center in Wertheim called "Wertheim village". To check on their business hours during the christmas/new years-season, check out their website.
Second place would be Nuremberg, which has so many things to offer that I could not even name them all. Than, of course, you could go to "Rothenburg ob der Tauber". The town center of this town is preserved in its middle-age original, and features the only "McDonalds"-restaurant with a cast-iron "M"-sign in stead of the golden elctrical version in the world.
Than there is a town called "Wartburg" with the famous castle of the same name, where Martin Luther lived for a time. His office (including furniture) is preserved there, and the castle itself I think is the biggest medival castle preserved intact in all of Germany.
Than there is the town Weimar, where Goethe lived, which is also a nice town to visit. IF you are interested in more recent history, Weimar is sadly also famous for having had a concentration camp during the terror-reign of the nazis, which is now made a memorial and Museum.
Than, of course there is the Town Dresden, which is also a UNESCO cultural heritage of the world, and famous for the "Stollen", a traditional baked loaf with lots of raisins and nuts and orange and lime zest, covered thickly with powdered sugar to represent the baby jesus in his wrappings.
So, than, to the west of Frankfurt (all of the above are to the east and south): There is Heidelberg, famous for its castle (sadly destroyed, but still famous for its enormous wine casks, kngihts armors and so on) and beautiful downtown area, and of course for the university.
The wine area along the river Rhine, and all its little towns, most famous of all probably R眉desheim, with the famous "Drosselgasse", which is a tourist trap. Lots and lots of old castles in that area, too.
Trier, probably, would also be a nice trip. Most famous in Trier is the "Porta Nigra" (the black gate), which is part of the old roman manifestations of the town, and is almost 2000 years old.
Closer to Frankfurt, though, are the towns Mainz and Wiesbaden. And if you are interested in Roman history, the old "limes" (pronounced "lee-mas", which was formerly the border between the parts of nowadays Germany concered by the Romans and the free parts under the rule of different germanic peoples, and is now the longest ground-covering historic site right after the chinese wall), look at the following websites:

http://www.hessen-limes.de/sites/English...

http://www.deutsche-limeskommission.de/i...

All right, that is all that I could think of right now. Try browsing through some travel books of Germany in a bookstore, and be sure to pick out the travel guides that are only on Germany, since they usually go into more detail than the ones being written about all of Europe.

Hope you have a good trip!

I am in Wiesbaden, it is a beautiful city, but not a good tourist area. I would recommend going to Mainz. It is much cheaper than most places we have been while in Germany. You can also catch the Rhine River cruise there. Rudesheim is awesome.

Have a great vacation!

well, for sure go see frankfurt, its easy going round, my bother (native american) just been here in october,m and found his way perfectly around to all the importend sightseeing places, within 2 days, - right now, theres chrismasmarket in ffm around the r枚mer, you must go see that, one of the biggsest!铆麓ll be there tomorrow......have a "Rindscurry" and a "Gl眉hwein"! try that! then if you got frankfurt, check out wiesbaden, a beatiful city,

well the rhein/Main area, is very "touristical" - so you wount find it hard to get around, easy by train too, tourist infocenters are very helpful for shortmadup-things!

Depends entirely on what you like doing, and what things you're interested in seeing. Some towns I'd recommend in the area, at various distances (other than Frankfurt itself, of course)... Wiesbaden, Mainz, Rudesheim, Wurzburg, Koblenz, Heidelberg, Stuttgart, Karlsruhe, Cochem, Konstanz, Trier, and Nurnberg. Outside of Germany but not *too* far... Strasbourg, France; Luxembourg, Luxembourg; Amsterdam, Netherlands; anyplace in Belgium; Basel, Switzerland. Paris, Prague, Bern, and Berlin are all roughly the same distance from Frankfurt, if you want to hit some capitals (Amsterdam, Brussels, and especially Luxembourg are an hour or two closer). Munich, and Salzburg (in Austria) are worth seeing. You can take a shuttle from the Frankfurt Flughafen (airport) to Frankfurt-Hahn, a small airport that isn't necessarily near Frankfurt but where you can catch insanely cheap flights to almost anywhere in Europe... places like Dublin or Bratislava for less than $100, for example. (The main carrier there is RyanAir; similar airlines that are cheap but don't use that airport are EasyJet and SkyEurope.)

I could be more specific about most of those places and many more that I didn't list, but that would be roughly the length of a novel. Shoot me an email if you want to know more or need some more ideas.