Underground Atlanta Professional Review and Guide
"Underground Atlanta, Atlanta’s “city beneath the city,” actually has two levels. Most of Underground is on the upper level, where you find the Visitors Center. On the level below street level, you will be walking on the ground that Sam Mitchell donated. The courtyard connects with Upper Alabama Street, home of fashionable shops.
Visitors can take stairs or an escalator to Lower Alabama and Lower Pryor Streets, the original streets of old Atlanta and site of old Underground. Special attractions: Atlanta Convention and Visitors Bureau Visitors Center, historic landmarks, Underground Atlanta, World of Coca-Cola Museum, three historic churches, Fulton County Government Center."