Rich Mahogany Chest

Jungle wood on the outside does not mean jungle loot on the inside. These roll the same table as a plain gold chest, so you are pulling for something like a Muramasa or a Cobalt Shield rather than anything tied to the biome you found it in. The biome specific gear lives in the ivy chests down in the shrines, not in the cabins.

Open it, obviously, but do not cross half the underground jungle for one. For a lot of players the container itself is the prize: empty it out, break it, and you have a piece of furniture in a wood pattern that is otherwise fiddly to get in quantity for a jungle base.