Sunken Ship in Aquifers! (like the goonies!)

While exploring the new cave generation, I started thinking of things to build in the new aquifers. A cool idea I had was to build a shipwreck like the one from The Goonies. Instead of building one, I thought, "what if there were 'underground shipwrecks' that very rarely spawned in the aquifers." These new kinds of shipwrecks could have increased treasures and could possibly contain exclusive loot. I don't think there should be a way to find these new kinds of aquifer shipwrecks through maps like the woodland mansion, instead, they could stay hidden and the only way to find them would be by spelunking in the new aquifers.