You may lose your luggage at Denver International Airport, but you'll never lose your car. DIA's public-parking-lot elves do their utmost to ensure that you'll remember not only which of the eight overnight lots you parked in, but what row and spot, by handing you a reminder note as you embark on the airport shuttle. But should you lose that slip of paper and find yourself wandering among the Siberian SUV wilderness of the Mount Elbert lot, never fear. The elves log every car, by its license plate, into a database at night. Just call the lot's emergency number to get your vehicle's exact location. You really auto try it.