"Fun fact: Some believe the drive-in was invented in Dallas. Keller’s is one of the few remaining drive-ins in town, serving up delicious, thin-pattied burgers on its distinctive poppy seed-encrusted buns since 1965. Get a side of tots and a milkshake to go with it. When you pull up, stay in your car, and place your order with one of the car hops (there are no speakers and no drive-thru). It’s old-fashioned, one-on-one service only, here." - Eater Staff