Underground has seen more than its share of ups and downs. It was created from the web of subterranean brick streets, ornamental facades, and tunnels that fell into disuse in 1929, when the city built viaducts over the train tracks. The six-block district opened in 1969 as a retail and entertainment center and remained fairly popular until it was closed in 1980 for the MARTA train project. After a $142 million renovation, it reopened with eateries, retail, and specialty shops. AtlanTIX, a half-price ticket outlet theater and cultural attractions, is in Underground Atlanta. It's open 11 to 6 Tuesday to Saturday, noon to 4 Sunday.