Denver International Airport went to the dogs (and cats) in December when the ultimate airport convenience — a luxury pet resort where you can drop off your pet on your way to check in for a flight — debuted at DIA's WorldPort facility. And luxurious it is: Amenities at the 24-hour pet hotel (sorry, dogs and cats only) include suites with flat-screen TVs (for Fido-friendly programming, of course!), play areas and a pool for dogs, and individual bungalows for kitties, complete with fish tanks and window ledges for keeping the felines frisky. Veterinary and massage services are also available. Now when you leave town, everyone gets a vacation!