Continent

Continent is the last power plant you unlock. It is big and provides enough space for some cells to place. You will gain this map usually when you are at curium cells and so its worth it to keep using curium cells on this map until you have balduranium cells researched. It provides some water on top and the bottom, though that is just wasted space as there is no efficient setup for regular pumps to use here. It would require too many unnecessary water pipes and max water upgrades for the water pipes.