You are in a maze. This one is made of wood, usually in castles they were corbels of the stones building out towers and walls. The casting holes are usually located at the entrance gate(s). The word comes from the Old French word machicoller, derived from the old Provençal machacol, which originated from the Latin maccare (to crush) and collum (neck).
A mezekouw was intended to be able to attack attackers who stood under the extension and therefore right in front of the gates and walls. Mezekow made it possible to harass these enemies with arrows and anything that could be thrown down such as boiling water and stones. Boiling oil and hot pitch would not have been used very often because oil and pitch were expensive.