Lacum Island is a large, circular island on Saaristo.
Lacum is noticeable for its large volcano, which is roughly at the centre of the island. The volcano is no longer active, and its crater is filled with an enormous lake, the primary water source for volcano dwellers. It is rumoured that the entire island was made from the volcanic activity, but this is far-fetched and very few Sagax believe it to be true.
Sagax have successfully set up a few cities and colonies on the island, as well as a large and successful nature reserve for the animals native to the island.