Astralica

Although Astralica is massive in size, a large majority of the continent is completely uninhabitable by humanoids. This is because the land to the north is not only a barren wintry wasteland, but horrifying creatures of nightmarish description occupy the hostile land. So nearly all of the inhabitants live on the Southern most portions of the continent, with the largest cities being found at the two protruding peninsulas. The creatures from the north occasionally swarm to the south, crashing over the cities like tidal waves of flesh. As such, the life expectancy of the humanoids here is incredibly short by comparison to the other continents, which they make up for by having a plethora of children. Astralica's inhabitants live in constant fear of what lies further to the north. They must always be on alert to defend their city against the unspeakable creatures that constantly surge forth from deeper within the continent.