This is the Gold Mine. Rumor is if you dig up gold nuggets... you can find the legendary gold puffle! If you think you have what it takes... head to the Pet Shop to start the quest.
There was a large tarp that was never removed from the room. In issue #505 of the Club Penguin Times, Aunt Arctic stated that the tarp was covering a machine, but she was unsure of its purpose. In issue #565 of the Club Penguin Times, Gary the Gadget Guy labeled the machine under the tarp as an unsolved mystery, remarking he was also unsure of the machine's purpose, but "at the very least, it works at holding up a tarp." If the tarp's object of the room's swf is deleted, there is simply empty space underneath.
According to Captain Pirate, the machine's function was to control the drill above it. Penguins would be able to operate a mechanism, which would charge the drill's battery, causing the drill to activate.[1]