The Dark Room is a dark tunnel where you find the Golden Egg. It can only be navigated once you have the glowstick.
You can find the Dark Room in the Poptropica Towers on Early Poptropica Island. It is located between a light green and light brown building. A fire hydrant and the Skateboard Kid are standing right beside it. There are two entrances to the Dark Room, one is on the ground of Poptropica Towers (which is in a form of a drain), and the other one is on the left side of the Storage Cavern. Once you enter the Dark Room, you will be in a maze. The ceiling and the ground are made of wood, the walls are made of dirt. The place must've been built a very long time ago since there are vines growing on the wooden boards.
It is a dark maze that can only be navigated by the glow stick found in the storage cavern. It can be accessed either by a manhole cover in Poptropica Towers, or by entering The Pit and travelling through the tunnel at the bottom. You must get through the maze in order to get the Golden Egg to return to the Purple Giant. Along the walls are clues written to guide you along.