[Answer] Where is this massive sphere?

Step 1 : Introduction to the question "Where is this massive sphere?"

...1. Brighton, England 2. Hamburg, Germany 3. Pittsburgh, Pennsylvania 4. Montreal, Canada

Step 2 : Answer to the question "Where is this massive sphere?"

Montreal, Canada - Although it's now an indelible part of Montreal's cityscape, the Biosphere actually originated with the United States. The U.S. government donated the structure after commissioning architect Richard Buckminster Fuller to design the project as its pavilion for the 1967 World's Fair in Montreal. According to Atlas Obscura, the giant steel structure was initially designed to be bolted together so it could be dismantled later, but budget constraints necessitated a change in plans. Instead, it was welded together and became a permanent fixture in the city. Unfortunately, a fire in 1976 burned away the acrylic shell around the sphere and the site was closed to the public until 1990. Around that time, Environment Canada purchased the sphere and turned it into an interactive museum focused on environmental conservation and green technology. It is still open today.:

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