Hey, thought I'd dig this thread back up again with another awesome German castle called Burg Hohenzollern:
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It's situated high on a rocky hill, making it hard to attack, here you can see it sticking out above the clouds:
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Looks almost magical, no? Like a floating sky castle.
It was mostly destroyed during a siege in the Thirty Years War (judging by this castle's almost-impossible-to-attack position high up on a rocky hill that must have been one Megablocks of a siege), but rebuilt again into a more beautiful castle that we see there nowadays.