Royal Botanical Gardens in Hamilton, Ontario is the largest botanical garden in Canada and one of the largest in the world. It is a National Historic Site, and registered charitable organization with a mandate to bring together people, plants and nature. Royal Botanical Gardens is a member of the American Public Gardens Association and Botanic Gardens Conservation International. Within its 60 documented collections approximately 40,000 plants are displayed in five major garden exhibition areas; the Arboretum, Hendrie Park, Laking Garden, RBG Centre and the Rock Garden. https://www.attractionscanada.com/Ontario/Hamilton/Royal-Botanical-Gardens.asp