There are destinations across the country where the long-defunct Mother Road remains ever present. These include El Reno, Oklahoma, nicknamed the fried onion burger capital of the world. The Canadian County city with a population of less than 20,000 invites visitors to embrace this legendary highway. Nestled on Route 66, you'll find classic diners, a timeworn motel with a striking Mid Century Modern sign, and an old school gas station called The Filling Station, all in El Reno.