Both the Sur and Bonny River valleys are wide, temperate and fertile volcanic valleys studded with small farming hamlets tilling the rich black volcanic soil, these valleys are the breadbasket of the metropolis of Haven Towne.
In addition to the barges of grain and produce that flow from the valleys into the city, the rivers also allow transport of goods arriving at Haven Towne into the interior of the island.
In addition, a system of aqueducts, originally created by the Annwyn Empire, has been expanded to bring fresh water from these rivers into the city, to supplement the wells that dot the city.
About 30 miles up the Sur and 35 miles up the Bonny, the wide valley narrows and rises into a series of cataracts that mark the edge of civilization. Beyond this point, the jungle highlands begin, the land becomes steep, the valley closes in, the jungle becomes dense and only small isolated mountain villages can be found.