The Toronto Magnetic and Meteorological Observatory is a historical observatory located on the grounds of the University of Toronto, in Toronto, Ontario, Canada. The original building was constructed in 1840 as part of a worldwide research project run by Edward Sabine to determine the cause of fluctuations in magnetic declination. Measurements from the Toronto site demonstrated that sunspots were responsible for this effect on Earth's magnetic field. When this project concluded in 1853, the observatory was greatly expanded by the Canadian government and served as the country's primary meteorological station and official timekeeper for over fifty years. The observatory is considered the birthplace of Canadian astronomy.

Saint Helen's Island is an island in the Saint Lawrence River, in the territory of the city of Montreal, Quebec, Canada. It forms part of the Hochelaga Archipelago. It is situated immediately offshore from Old Montreal on the southeastern side of the Island of Montreal in southwestern Quebec, and is part of the central borough of Ville-Marie. The Le Moyne Channel separates it from Notre Dame Island. Saint Helen's Island and Notre Dame Island together make up Jean-Drapeau Park.