CN Tower, Canada

The CN Tower is the World's Tallest Building and Free-Standing Structure and has the world's highest public observatory, although it is not considered to be a traditional building. At a height of 553.33m, it is an important telecommunications hub. It is almost twice as tall as the Eiffel Tower and more than three times the height of the Washington Monument.
Located in Toronto, Ontario, Canada at the southern end of town to the north shore of Lake Ontario, the CN Tower is easily accessible from many major streets and highways. It was erected as a communications and tourist tower.

The CN Tower consists of a main hexagonal hollow pillar of concrete containing the elevators, stairwells and power and plumbing connections. To the main pillar are attached the broadcast antenna and the two main visitors area. The main pillar has three supporting legs giving it the appearance of a camera tripod.

Some floors of the Main Level are open to the public. At 342 m is the Glass Floor and Outdoor Observation Deck. The Glass Floor consists of thermal glass units that are 64mm thick. The floor has an area of 24sq metre and can withstand a pressure of 600psi. At 346m is the Horizons Cafe and Look Out level.

There is a rotating restaurant at 351m called the 360 Restaurant. It revolves completely in 360 degrees every 72 minutes. The rotation is slow enough that you can enjoy the fantastic views of Toronto without realizing your view is changing every moment. Below the Main Level is the tower's microwave receiver shaped like a big white donut.

The Sky Pod is presently the highest observation deck in the world. From here, you can see 100-120 km away, to the city of Rochester across Lake Ontario in the US, and see the mist rising from Niagara Falls.

The CN Tower has the tallest metal staircase in the world. At the 1776th step, the staircase reaches the Main Level. The staircase is intended only for emergency use, and is not open to the public outside three times a year during the charity stair-climbing events.

At the base of the Toronto CN tower is an attraction called the Tour of the Universe. For the price of entry you can walk through a simulated space port, see a laser show and experience what it’s like to fly through space. Tour of the Universe is open daily from 10am until 10pm. The CN Tower is open 364 days a year (closed on Christmas Day). Hours of Operation are daily from 9am-10pm January-April; 8am-11pm May-December. Cost is $16 for adults.