Definition: Moat
A deep ditch usually filled with water that surrounded a castle and worked as protection against assault
Caerlaverock Castle, Scotland.
Sleeping Beauty's Castle at Disney world
Moated caslte in Germany.
In this video you'll be able to visit a German castle and see how outside and around the castle, there's a moat
http://www.youtube.com/watch?v=Nh_L6pQvBr8
Wild ducks swimming in a moat outside a German castle.
http://www.youtube.com/watch?v=hCQC9oA1QJs
Swans and wild ducks swimming in a moat at Beaumaris Castle, Wales.
And...Scuby Doo and his friends visit Dracula's moated castle! (Pay special attention to minute 1:18 and 1:47 :)
http://www.youtube.com/watch?v=K_ZcR5-kzv4&feature=related