| This room was a temporary room.
It could only be found in Club Penguin for a certain period of time. It may or may not have returned later.
|Where||End of the Underwater Maze|
|Opened||January 26, 2012|
|Closed||February 1, 2012|
The Mysterious Deep was a members-only party room during the Underwater Expedition. When members completed the Underwater Maze, they could have accessed this room as well as received the Submarine Suit as a free item.
- The 10th buoy was found floating here, before it was moved to the Lodge Attic.
- After completing the Underwater Maze and exiting the room, players could return to the room without going through the maze again, like the Mountain Top and Brown Puffle Cave at the Mountain Expedition and Wilderness Expedition 2011, respectively.
|Underwater Maze|| ||Beach|