The Big Chicken is a Marietta landmark.  It's located at the corner of Roswell Road and U.S. 41.  Originally a locally-owned chicken restaurant, the Big Chicken is now a KFC restaurant.  Its 56-foot-tall mechanical chicken sign has survived since 1956.  The sign has a beak which opens and closes, and eyes that roll.  Because of the chicken's prominent location, it is regularly used as a landmark for directions, and some pilots say they look for it when landing at ATL. 

Big Chicken, Marietta, Georgia