CN Tower, is a telecommunications tower located in Toronto (Canada). With its total height of 553 meters, it is the fourth tallest structure of this type existing in the world and is the third tallest freestone structure in the world ever built. History In the early 1970s, Canada began to emerge on the world stage as an industrialized country with great capabilities. The economy recorded very encouraging growth rates, and the average wealth of Canadians was very close to that of their neighboring United States of America. On the wave of this national-economic turmoil, Canadian National (CN), a national body operating the Canadian rail and telecommunications system, decided that it was time to build a structure that could represent Canada in the world. Based on this, given the need to be able to transmit radio-television signals over long distances, it was decided that a very large multifunctional tower would be built. The final project of what would have been baptized as CN Tower, envisioned an enormous concrete structure, with three large triangular-shaped pylons placed vertically and leaning against a single large hexagonal reinforced concrete pylon. To ensure that this structure could be enjoyed by the population and could become a worldwide attraction, a huge steel and concrete disc was inserted into the project, which, starting from the 342-meter dimension, would have housed 4 storeys of premises visitors can be visited by tourists. The construction work began officially on February 6, 1973, and the tower was officially opened to the public in the spring of 1976. In the early 1990s, due to over-maintenance costs, CN Tower was sold to a private company which still maintains its property. Located just a short distance from downtown Toronto, between the Union Station, the Rogers Center (multifunctional stadium, mainly used for baseball) and the Air Canada Center (basketball and hockey stadium), the CN Tower is today the biggest destination city tour. From the top you can admire the entire skyline of the Canadian city, the view of Lake Ontario to Detroit, and the north view is lost for the immense plain that leads to Hudson Bay. At the top of the tower there is a restaurant, a piano bar and an observation point with an outdoor terrace. One of the strengths of the observation deck is the Glass Floor: in practice, a part of the floor is covered with thick glasses that allow visitors to walk with the feeling of being suspended in the vacuum at the impressive height of 347 meters. The restaurant, located at 360 meters high, is also turnable and takes a full turn around the axis of the tower every 90 minutes. At the highest point of the tower, the Skypod, located at 447 meters high, on clear days you can see the great plains and, to the south, the United States of America. CN Tower Today Today the tower continues to be a major tourist attraction for the City of Toronto. Despite this, its main function remains that of a huge telecoms transmitter. In 2002, the tower was subjected to a series of maintenance and modernization works, which saw the creation at the base of the tower of a number of shops, restaurants, cinemas and small game halls for the leisure of tourists.