This vintage postcard from Expo 67 in Montreal, Canada, showcases the spectacular Gyrotron attraction in La Ronde. The front captures a vibrant scene of fireworks illuminating the aluminum structure, reflecting the excitement of the event. The reverse side details the Gyrotron's thrilling experience, where visitors journey through a 217-foot pyramid and descend into a simulated volcanic crater. Produced by Plastichrome of Canada, this postcard is an exquisite collectible for those interested in Expo 67's historical allure and architectural marvels.