This one is primarily taken care of as you get the lower achievements. However, places you can finish up are Sanctus Seru (arena is a good spot), Dulak (around the fort) & Gunthak (around the boats/buildings).
Many races can be located in Sanctus Seru (large concentration of various races in Arena area) and Gunthak.
Dark Elves can be located in a large number in Mistmoore. Drakkin can be located in a large number in Ashengate and Direwind Cliffs Wood Elves, Dark Elves, High Elves, Half Elves, and a couple other races can be located in Bloody Kithicor Guktan I have only located in Mountains of Rathe (the home city area for Guktan race)