We just learned about the watery Moat that goes around a castle.
Another part of a castle is a Palisade, also sometimes called a stakewall or paling.
This is a fence made from iron or wooden stakes that was put around a castle to help defend it.
Because it wasn't very big like a stone wall, these defenses could be put up very quickly if people were afraid of an attack coming soon.
(from: wikipedia - palisade)
Kid Facts - Blast from the past: Malbork Castle