When in the southwestern end of Ontario, a day trip to the beautiful St. Jacobs and a walk around the Elora Gorge conservation is a must. www.grandriver.ca
If you happen to be in the Kingston area for a visit I highly recommend a tour of the Kingston Penitentiary museum. We did the 2+ hour tour and it was incredibly interesting to learn of its history and walk the halls. www.kingstonpentours.com