Geomorph G4: Circular Rotating Room

This geomorph in the Gears and Machinery series, G4, focuses on a rotating room, similar to the one in G1, but larger; it's assumed to be constantly rotating, which is why there's a small river with a paddle wheel to provide constant energy to turn the gears. Assume the river is on a separate inter-level area, if you don't want to worry about matching it up with other geomorphs. The idea for this is mainly from The Gods of Mars and Warlord of Mars by Edgar Rice Burroughs; there's a room in the Temple of Issus that rotates in sync with the movements of the sun, closing off access for long periods. This version spins a little faster, although the speed is up to the GM, and has several exits that the room cycles through, none of which are connected to each other. One of the exits is an actual door instead of a doorway, which should be fun trying to get through...

The gear level is accessible from the right lower entrance, which might even allow river access. The entrances on the right overlook the river from a cliff.