A parking brake, like a bike lock or an airplane chain, ensures that unattended vehicles won’t roll away and accidentally crush your favorite pet pop can. Secure your at-rest ride with today’s Groupon. For $12, you get three days of parking at Airlines Parking, located across I-94 from Detroit Metro Airport in Romulus (up to a $36 value).

Armed with a vast arsenal of impressive amenities, Airlines Parking provides secure temporary housing for automotives in need of a snooze. Turn your ride over to one of the friendly, experienced carsitters, and relax as they steer it toward its three-day resting place. More than 5,000 spaces await vehicles of all stripes, and a blindingly speedy staff teams up with mostly friendly computers to quickly and efficiently organize blocks of intentional traffic. Round-the-clock security and a complex-spanning fence keep cars safe from vengeance-driven deer, and free battery-booster service and tire air cure automobiles suffering from a deflated sense of self. After dropping off your car, enjoy a quick trip to the airport in one of Airlines Parking's motor coach shuttles.

Although Airlines Parking sometimes offers a discounted rate online, this Groupon still offers the best deal available. AAA cardholders receive a rate of $10 per day.