The monument is constructed entirely from variants of prismarine and lit by sea lanterns. The treasure chamber with a sponge room (smaller dark prismarine room) to its left. The seafloor surrounding the monument will be cut off should it be higher than the monument's base. In Bedrock Edition, ocean monuments always generate at the same Y level, with the top of the roof always being at Y=56. Ocean monuments always contain three elder guardians – one at the top and one in each wing.

The area of the ocean monument spawns only guardians after generating, also being the only location they spawn. They generate in locations that they would have generated in the current version of Minecraft, regardless of what terrain was originally there, meaning they may generate inside large square pools of water surrounded by land, causing the terrain to be harshly cut off. the amount of time players have been in the chunk) of less than 3 minutes. Ocean monuments may also generate in existing chunks with an InhabitedTime (i.e. They can be located with ocean explorer maps, which are bought from cartographer villagers with emeralds. An ocean monument can also overwrite other structures like strongholds during generation. It is the largest structure that does not contain a loot chest and the largest water structure. In order to prevent air pockets, water generates around the monument as a part of the structure. Ocean monuments generate in areas with deep ocean biome variants everywhere within a 16 block square radius around the center point, and an aquatic biome (regular/deep/frozen ocean, regular/frozen river) everywhere within a 29 block square radius around the center point.

Minecraft map city