 The main towns are Hyden, Gnowangerup and Lake Grace; lesser towns include Kulin, Ongerup, Duggan, Newdegate, Lake King and Kondinin.The subregion contains a number of ecologically important freshwater wetlands, including the Lake Bryde-East Lake Bryde wetlands, a DIWA Wetland of National Significance and habitat for a critically endangered threatened ecological community of shrub lake beds; the Lake Grace system of wetlands, also a DIWA Wetland of National Significance; and the Lake Cronin system.Western Mallee is situated on south-eastern parts of the Yilgarn Craton.