(taken from the PathfinderWiki)
Only recently settled by colonists from the Chelaxian Empire, the wild frontier of Varisia (pronounced vah-RHIS-ee-ah) is composed of rural communities, independent city-states, cyclopean ruins of the ancient and mysterious Thassalonian Empire, and uncharted wilderness.
Varisia is a vast frontier region in the northwest of Avistan. It stretches from the Steaming Sea in the west to the Mindspin Mountains in the east and from the Kodar Mountains to Conqueror’s Bay in the south. The region possesses a variety of environments within its limits, from the swampy Mushfens of the south to the flame-scorched Cinderlands on the northern Storval Plateau
Varisia has no central government. It is a collection of independent city-states that each holds sway over a small collection of towns and villages. Korvosa is the oldest and largest of these cities, founded as a Chelish colony in the 45th century AR, and is the only one to have established a hereditary monarchy. Thousands of dissatisfied Korvosans fled to Magnimar less than a century ago, disagreeing with their mother city’s allying themselves with the new, infernally-backed Chelish government. Although Magnimar had existed before, the mass influx of new citizens made it a true rival to Korvosa’s economic dominance of the region. The city is ruled by a lord-mayor and a city council known as the Council of Ushers. Far to the northwest of Magnimar and Korvosa is the pirate-haven of Riddleport. It is governed by a powerful Overlord who runs with a harsh, but decidedly laissez-faire attitude. The smallest of Varisia’s major cities is the unusual city of Kaer Maga, found on one of the highest parts of the Storval Rise. It exists in basically an anarchic state, with numerous smaller power groups looking after their own interests