Tumbling Into The Necronomicon
Deeper and deeper, you are pushed beyond the edge of sanity, losing yourself to the smells of slime, sulphur and seasalt. You recover gradually, yet are shocked awake by a scream: "Ph-nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn!!"
Before you lies a coastline of mingled mud, ooze, and weedy Cyclopean masonry which can be nothing less than the tangible substance of earth's supreme terror - the nightmare corpse-city of R'lyeh, that was built in measureless eons behind history by the vast, loathsome shapes that seeped down from the stars.
The unbelievable size of the greenish stone blocks and the dizzying height of the great carven monolith are awesome. Even so, the geometry of this dream-place is all wrong, non-Euclidean, and poignantly redolent of spheres and dimensions apart from ours.