Ontario’s Greenbelt is the largest of its kind in the world. It also protects some of Ontario’s most spectacular and ecologically sensitive areas, including a wide variety of old-growth forests. The oldest tree in Ontario is in the Greenbelt: an ancient cliff-growing cedar on the Niagara escarpment that is over 1,300 years old. Deep shady hemlock valleys, oak savannas, and hardwood forests carpeted with trilliums are green oases beside urban developments. Peter’s Woods, on the Oak Ridges Moraine, is considered one of the finest old-growth forests in Southern Ontario.