What could be more classic Americana than a drive-thru restaurant? How about one shaped like a donut? Or a drive-in diner where burgers are delivered to your car by servers on roller skates? The first drive-thru is believed to be Red's Giant Hamburg, which opened in Springfield, Missouri, in 1947 along Route 66. The legacy lives on in these charming drive-thru and drive-in restaurants across the US. Check individual websites and state travel advisories for the latest information before planning a visit.