Underwater Ruins are structures that were added as part of 1.13 - The Update Aquatic. They consist of stone bricks, polished granite and cobblestone, are similar to Ocean Monuments and Shipwrecks, and will generate on the ocean floor.
Underwater ruins were added in the snapshot 18w09a and come in many different layouts. Players can locate them with the command
- Underwater ruins also come in a Sandstone variety if they generate in warm oceans.
- Underwater village ruins may also be found.
- Although rare, it is possible to find an underwater ruin above water. Water may flow from it while the ruin is excavated.