It could also protect the castle if the enemies comes.
The ditch around a castle is called a moat.
a moat
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Another word for a deep ditch that is dug around a castle is a moat. You could call it a trench, or you could fill it full of water and call it a moat.
A Moat
at the main way in if the castle has a moat or ditch.if there not moat of ditch then there no drawbrigde un less the castle ramdom
It's called a moat.
The water-filled trench around a castle is called a moat.
a moat is a big ditch around a castle its filed with water to hold off invaders