Atlanta makes the list for the first time in the No. 2 slot. Greater urban areas of poverty, a high foreclosure rate (nearly five times the national average) and lower city expenditures on structures and highways contribute to its rodent problem. On the bright side: Atlanta's metro area boasts 5.3 million people who can enjoy all sorts of creatures — not just rats — at Zoo Atlanta and the Georgia Aquarium. And you might be more inclined to let your children pet the animals at the Yellow River Game Ranch and the miniature farm animals at Tanglewood Farms than you would the rats hiding under the house.