Castle Surrounded By Water

A water castle (German: Wasserburg or Wasserschloss) is a castle or stately home whose site is entirely surrounded by moats or natural waterbodies. Topographically water castles are a type of lowland castle.
There is a further distinction between:
Water castles, that are protected by artificial water-filled moats or ponds (man-made defences)
Water castles, whose primary means of protection is from river courses or which stand on islands in a lake or natural pond (natural defences).