From SimCity Wiki
Nautilus Plateau is a city in the region of Horizon Archipelago. It is a towering city with panoramic view of the archipelago. Rose Bridge helps the player to ship all the coal and raw ore extracted from massive underground deposits. A city specialized in mining is perfect for this location.
Nautilus Plateau has large supply of ore, coal and water with some wind but no oil. It has no port access, only rail connection.