If you stick your head over the edge, you'll see the Cesky Krumlov bear. You are recommended not to fall into the moat obviously, as one of my acquaintences did once (yes, really). Someone fished him out eventually before he got eaten, and he has since then not fallen into any other bear moats.
Unrivalled even among UNESCO world heritage sites. This 700 year-old village is still full of alchemy. With a river looping around twice, you can't help but walk around in circles all day in amazement.