Crypt structure

Located in the Roofed Forest biome, it appears to be a ruined church. The main structure is essentially useless, it is the fountain that contains the treasure. Note that the fountain is not in every crypt structure. To get to the treasure, there is a secret one-block passage that you need to swim through in the fountain. You will then discover a tunnel with gravestones inside and at the end lies the treasure. It has roughly the same value as that of a desert temple.