Get Water Buckets and fill them with water.Most mobs can’t jump up vertically more than one block, so a two-block deep trench will stop them. The width is for aesthetics, but the depth is the key security measure.Make it at least three blocks wide and two blocks deep. Use a shovel to dig a trench around the exterior.Lay the groundwork for your castle with at least four towers and two floors.To enhance your castle’s security with a simple moat, follow these steps: Small Moat Castle Image Credit: One Team. Plan the castle layout with Stone Bricks, including a one-floor keep, two small stone towers, and a gate. You can use Cobblestone as is or convert it to Stone by smelting in a furnace.Ĭraft Stone Bricks by placing Stone blocks in a 2×2 pattern for a fancier look. O create your first Minecraft castle, mine Cobblestone for materials.