File:Sponge and treasure.png

Summary
Sponge room (left) and treasure chamber (right) in a large hollow space generated at the back of an ocean monument.

This ocean monument actually has three sponge rooms; the one shown, another one nearby one level higher, and another off to the right of the view.

This monument is nearest to the world spawn point in the Bedrock Edition "Ocean Monument Ahead" seed (-513070979) from seed templates.