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多伦多电视塔卫星地图 (世界奇迹指南)

http://en.wikipedia.org/wiki/CN_Tower At 553.33 meters (1,815.39 feet), Canada's National Tower is the world's tallest free-standing structure on land. The CN Tower is located in the city of Toronto, Ontario, Canada and is considered the signature icon of the city which attracts over 2 million visitors yearly. Built in 1976 by Canadian National Railway (CN) to demonstrate the strength of Canadian industry, the tower was originally designed as a radio and television transmitting antenna. There are microwave receivers for distant signals at about 305 meters, and the top of the transmission antenna is at the apex of the tower. Metal staircases with 1776 steps reach the Skypod level (447m) and are the tallest metal staircase on earth.