Photo: Benreis, CC BY-SA 3.0 via Wikimedia Commons
Beautiful pool and spa right at the lake
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Neues Schloss
This baroque castle was built between 1712 and 1760. It houses some art galleries and temporary exhibition. Skip the café though, there are lots of better places to eat in Meersburg. There are great views from behind the new castle (free access). General information: +49 7251 742770.
Burg Meersburg
The oldest parts of this castle date back to the 7th century. Most of the rooms are furnished in period style. A newer section was the living (and death) quarters of one of Germany's best known poets, Annette von Droste-Hülshoff. This castle is probably the single best reason to visit Meersburg. It also has a small café with outdoor seating with lake view. If you only want to visit the café, you can see the first few rooms of the castle for free on your way to it. (To do this, you have to buy a café coupon for a couple of euros which is then used to purchase items at the café.) Absolutely recommended if you happen to be there on a day when there's a clear view of the Alps across the lake.