Orb Rooms are secret areas that appear throughout the world. They always contains an Orb of True Knowledge and an Emerald Tablet, and have a small pool of water on each side.
Beneath the room typically is an area of (extremely) dense rock with diamond veins and air pockets.
For information about the orbs and the location of all the orb rooms, see the list of orb room locations.
Secret Messages[]
Each Orb Room has a secret message, revealed by adjusting the contents of the pools by the sides. The combinations varies by room, requiring much experimentation to discover them all. The combinations that work are hinted at by the Stone Tablets that can be created from certain Emerald Tablets.
For details on the lore these messages contain, see Game Lore.