The History Channel is launching its second annual architecture/engineer “Cities of the Future” design challenge with another design competition. “The City of the Future: Cities of the UnderWorld” will be held in three cities—San Francisco, Atlanta, and Washington, D.C.—and is open to architectural design teams nationwide. Partnering with the AIA, The History Channel, Infiniti, and IBM are conducting an open search for 12 teams (4 in each region) to imagine the future of some of the country's most important cities. The selected teams will compete alongside a slate of nationally recognized designers. This year, the competitions will be held in the three host cities between January 14 and January 30, 2008. To be considered for participation, follow the submission guidelines on the competition Web site. All submissions must be received by 3 p.m. ET on November 9.