The Georgetown Steam Plant is a National Historic Landmark located in Seattle's Georgetown neighborhood. Every second Saturday of the month, Seattle City Light opens the plant up to the public between 10am-2pm. There are free guided tours at 11am and 1pm. The plant itself is next to Boeing Field/King County Airport and follow these directions (provided by Seattle City Light). Directions driving South on Interstate 5: 1.) Take Exit 161, Albro Place. Turn right onto S Albro Pl. 2.) S Albro Pl turns into Ellis Ave S. 3.) Turn left onto S Warsaw St.