The Central Plains contains the Stronghold, the Sanctum. 

This region was once a forgotten kingdom of ages past, its grand castle standing in eerie solitude at the northernmost point, surrounded by rows of empty houses, buildings, and a town square, and six abandoned villages to the south. The area had been barren for centuries, with sparse vegetation and no towering trees, offering little interest until the apocalypse arrived. Ironically, its desolation became its strength—its lack of dense flora and vegetation meant fewer dangers compared to other regions, giving it a higher survivability rate. In time, a group of survivors claimed the land and transformed it into the stronghold now known as the Sanctum. 

Around the region include grassy plains, flowerfields, and a handful of dense forests that are usually patrolled by Officers, for safety, foraging, and monitoring alike. It likewise contains some bodies of waters, like lakes and rivers, and small hills at the outskirts of the region. Before the reveal of the world of HoE, this was where, assumably, all interactions, which necessitated a natural location, between the HoECs had happened.