In 1995, the CN Tower was classified as one of the Seven Wonders of the Modern World by the American Society of Civil Engineers. The CN Tower shares this designation with the Itaipu Dam on the Brazil/Paraguay border, the Golden Gate Bridge in San Francisco, the Panama Canal, the Chunnel under the English Channel, the North Sea Protection Works off the European coast, and the Empire State Building.
Since the Tower opened, Canadians and tourists from around the world have made the trip to Toronto to celebrate this marvel of civil engineering.
-The CN Tower at 553.33 meters (1,815 ft., 5 inches) was once the tallest building, tower, and freestanding structure, but as of 2010 retains the title of world's tallest tower.
-Construction on the CN Tower began on February 6, 1973 and wrapped up about 40 months later in June 1976.
-The CN Tower was built at an original cost of $63 million.
-The CN Tower's Glass Floor was the first of its kind when it was opened in June 1994. It is 23.8 square meters of solid glass and 5 times stronger than the required weight-bearing standard for commercial floors. If 14 large hippos could fit in the elevator and get up to the Observation Deck, the Glass Floor could withstand their weight.