Like all aspiring Pokemon trainers I'm always looking for the best area to spend a few hours or even a whole day hunting in; and so far, Mawson Lakes has been the best. Not only does it offer some rare Pokemon, there are also a large number of Pokestops right next to each other.
Pokestops When I am hunting here I spend most of the time at the Hulk Balls where there is not only 4 nearby pokestops but 2 nearby gyms. I sit on one of the grass hills where you can reach 2 pokestops and the gym with out moving. If battling is less your style and you're more interested in the Pokestops, by sitting on the corner of the oval you can reach 3 at once! Put a lure on one or two and you're set!
The walk around the lake also offers not only an opportunity to hatch those eggs but also multiple pokestops.
Pokemon of interest I have found all of the starters in Mawson Lakes at one point or another. I also catch at least 5 Kabuto (or Kabutops) every time I adventure here as well as Omanyte! I have also caught multiple Psyduck, Execute, Goldeen and Starmie.