Much of Pantheon's surface is desert, or barren rocky plains of sandstone and gravel. However, much of the desert areas are populated by mechanical and steampunk megacities inhabited by robots. There are certain areas where there are tidal waves and geyers composed of sand. This is because of the motion of the AI factories deep beneath the surface act as a secondary set of techtonic plates, causing sand and gravel to fly up in between the motions of the factories. Occasionally, the factories will generate buildings, which will "sprout" through the sand and begin creating robots to colonize the area. Some areas of Pantheon get so hot that it is dangerous from the cybernetic lifeforms to get near ground, as they will begin to crack, smoulder, and in some cases, even melt.
At the very top of the north pole, there is a massive mountain, nearly 2.5x that of Mt. Everest that has a raging waterfall and river spewing from the top. This river leads into a cave at the bottom of the mountain's base, which then feeds into an underground ocean. All large bodies of water of both fresh and salt varieties on Patheon are located under the surface. They are easy to access thanks to the shafts built all over the planet by the Robot inhabitants.
Because of the water eroding the land beneath, it is speculated by some that in a few eons, most of the desert surface will cave in and the planet will become an predominately-ocean planet. This, however, is only speculation.