When I was in Toronto some years ago I visited the CN Tower, which has a glass-floor observation area. http://www.cntower.ca/en-ca/plan-your-visit/attractions/

When I was in Toronto some years ago I visited the CN Tower, which has a glass-floor observation area. http://www.cntower.ca/en-ca/plan-your-visit/attractions/glass-floor.html http://www.cntower.ca/en-ca/plan-your-visit/attractions/glas... The conflict between what my eyes were telling my brain and what I otherwise believed to be true was quite enlightening. I guess it's the neocortex arguing with the reptilian brain.