The doors will be open to heritage homes and buildings in Thunder Bay once again this Saturday. City Heritage Researcher Lee-Ann Chevrette says it's a great opportunity for residents to see inside buildings that are normally not open to the public. This year's sites include the Museum, Prince Arthur Hotel, St. John's Anglican Church, Hillcrest High School, the Finnish Labour Temple, and the Brodie Resource Library. Doors open is free and being held at locations across the City on Saturday from 10 until 4 pm.