McDonald's

The oldest McDonald's restaurant is a drive-up hamburger stand at 10207 Lakewood Boulevard at Florence Avenue in Downey, California, United States. It was the third McDonald's restaurant and opened on August 18, 1953. It was also the second restaurant franchised by Richard and Maurice McDonald, before the involvement of Ray Kroc in the company. The restaurant is the oldest one in the chain still in existence and is one of Downey's main tourist attractions. Along with its sign, it was deemed eligible for addition to the National Register of Historic Places in 1984, although it was not added at the time because the owner objected.

Source: Wikipedia