Atlanta Zero Mile Post, Railroad terminus marker in Downtown Atlanta, US

The Atlanta Zero Mile Post is a stone marker placed at the location where the Western and Atlantic Railroad had its southern terminus point. The original sits in a museum exhibition, while a replica marks the initial spot beneath Central Avenue.

A stone marker from 1842 marked the southern end of the railroad line after a landowner donated property for the station site. From this point, the settlement grew from a place called Terminus into Marthasville and eventually became the city of Atlanta.

The marker's crown is pyramidal, and one face is engraved "W&A RR 0.0", the double zero marking the start of the Western & Atlantic line; the opposite face reads "W&A RR 138". The restored Texas locomotive, one of two surviving W&A engines that passed the post in service, is displayed with it at the Atlanta History Center.

The original marker is housed in a museum exhibition, so visiting there requires planning ahead to view it. A publicly accessible replica beneath Central Avenue is easier to reach and shows where the historic spot was located.

The marker's above-ground portion is about 1 foot wide per side and 42 inches tall, with a pyramidal crown; fully exposed it measures 7 feet 5 inches and weighs roughly 800 pounds. One face is engraved "W&A RR 0.0", the other "W&A RR 138".