Whenever I wonder if I'll ever be able to afford a house in San Francisco (motto: If you could afford to live here, you wouldn't), my mind wanders to a web site I found long ago while idly searching the web. It's for Die Tannenburg (aka, Schloss Tannenburg or Burg Tannenburg, which means either Castle Tannenburg or Fort Tannenburg, though I like the idea of having a castle in the family rather than a fort), a bed and breakfast in the German state of Baden-Württemberg.
As you can see from these photos I nabbed, it's a wonderful old building in beautiful countryside. Originally constructed either 800 or 900 years ago, the castle was purchased in 1931 by Ernst Zipperer. I have no idea if I'm related to the Zipperer family that still owns the castle; though one part of my family did come from Baden-Württemberg, Zipperer is a very German name and not at all uncommon there.
Anyway, Schloss Zipperer aka Tannenburg is a place I'd like to visit sometime. If you're interested, visit its web site.
There's more history on Burg Tannenburg here in English and here in German. Here's what German-language Wikipedia has to say.