This national historic site which was once the home of R.S. McLaughlin, founder of General Motors of Canada. Some of the homes features include lavish original artwork, furnishings and mementos. The house has 55 rooms, and has a large art collection. Up to 30 of the rooms are available to view. Address: 270 Simcoe Street N Oshawa ON L1G 4T5 1 905 433-4311