Peachtree Center station is an underground train station on the Red and Gold lines of the Metropolitan Atlanta Rapid Transit Authority (MARTA) rail system. It is the deepest station in the MARTA rail system, at 120 feet (37 m) below Peachtree Street. It serves the Peachtree Center area of downtown Atlanta, and is the first station north-northeast of the rail system hub at Five Points. This is one of the busiest stations on the Red/Gold Lines handling over 15,000 people per weekday. The northeast entrance of this station is located in the lobby of the Peachtree Center Mall, and in the northwest entrance a United States Post Office is present, the closest proximity of any United States Post Office to the system.