Saint Helen's Island is a small island located in the Saint Lawrence River, near the city of Montreal, Canada. It is part of the Montreal borough of Le Sud-Ouest and is known for its beautiful parks and recreational areas. The island was originally used for military purposes but has since been transformed into a public space for residents and visitors to enjoy. The island is home to several attractions, including the Montreal Biosphere, a museum dedicated to the environment, and the La Ronde amusement park. Saint Helen's Island also hosted the 1967 International and Universal Exposition, known as Expo 67, which significantly contributed to its development as a cultural and recreational hub.