National Model Railroad Association National ConventionJuly 14, 2013 to July 21, 2013 http://www.nmra2013.org/
From the Convention Website:
Atlanta's Piedmont Divisionis proud to host the 2013 NMRA National Convention. Located in Northwest Atlanta, the Cobb Galleria Centreis a beautiful facility to house the convention and the National Train Show. Layout tours will provide access to more than 60 layouts already showing on the annual Piedmont Pilgrimageopen house event in each November. Other impressive layouts from around the Southeastern Regionwill also be on tour.
Cobb Galleria Centre
2 Galleria Parkway
Atlanta, GA 30339