City of Richmond Hill

  • Drone shot of the David Dunlap Observatory

    Plan Your Trip!

    The Richmond Hill David Dunlap Observatory (RHDDO) opened in 1935 and is located at 123A Hillsview Drive. A number of important studies have taken place here and you can learn more before you visit.

  • Child looking through telescope chalk drawings

    Astronomy Programs and Makerspace

    Explore the night sky, discover the cosmos and learn about the history of this unique site with our exciting selection of fun and educational programs for all ages. Find out more about our new Makerspace Memberships.

     

  • RHDDO Dome and Administrative Building

    Ongoing Projects

    The RHDDO Park Master Plan sets out a vision for the future enhancement, management and programming of the RHDDO Park, including woodlot restoration.