Soon enough they were across the zip-lines and Sheeana was staring at the man-made pool, tiled and plasteel, a great chamber. Underneath were more and more tunnels, she knew, a labyrinth of untold miles under the waves.

Her Fremen instincts were going topsy turvy, heart suddenly accelerating until she forced it down. "This much water would be enough for the whole of Dune for years."