You see a grand windmill in the distance, but its true magnitude is only heightened the closer you approach.
Vastly different than windmills you've ever seen on Terra, this monstrous building is akin to an entire factory. The sails don't seem to have aged at all, and upon closer inspection you find they are made of thin plates of hardened ceramic bleached white by the sun.
The sails move at a gradual pace, picking up the wind caused by the forward momentum of the island.