Ontario park website: https://www.ontarioparks.com/park/kettlelakes

This is a little drive from Toronto but it's worth it! There are 22 kettle lakes formed by glacier, infact the landscape of this park is formed by some the last ice age glaciers, as the glaciers retreated, the icebergs that were half-buried melted and form small deep lakes that are called kettle lakes. The park mostly consists of jack pine trees, beautiful beaches and chances a spotting a bear is really high (we saw twice). The nearest city is Timmins, famous for gold mines so do give a visit to this city. The other interesting places that you can visit nearby is the town of Cochrane, it's the birth place of Tim Hortons.