The CPR John Street Roundhouse, stunning home of Steam Whistle Brewing, is located downtown, just steps from the CN Tower. Built in 1929, The Roundhouse has been designated a National Historic Site. This facility originally serviced over 50 passenger trains coming in to Union Station daily. It also included a 120-foot long rotating turntable, designed by the Dominion Bridge Company, which could move an incoming locomotive into an available bay for repair or storage.