and United States air transport authorities, due to its proximity to the international boundary. It was the second tower to be built using the slipform method, in which concrete is continuously poured into a form moving slowly up the tower. It was built by Pigott Construction of Hamilton, Ontario. The same methods were also used to build the Inco Superstack in Sudbury, and the CN Tower in Toronto. The tower features three outside-mounted "Yellow Bug" elevators. At the time of their construction, they were the first such elevators in Canada. They were designed, engineered and maintained by a division of the Otis Elevator Company from Hamilton, Ontario and can carry passengers to the top of the tower in 52 seconds. Unlike conventional elevators that are guided by side rails, the Skylon elevators operate with a guide rail on the backside only. Special equipment is employed to prevent the cables from becoming tangled in the wind or impeded by snow and ice in the winter. A curtain wall on the outside of the tower behind each elevator protects the counterweight and travelling cables from the elements. The tower has two restaurants at its top, the Revolving Dining Room and the upper Summit Suite Buffet. The Revolving Dining Room seats 276 people and revolves once every hour by resting on a circular rail that is propelled by a motor. An observation deck sits at the tower's summit. The base of the tower features a number of gift shops, fast food restaurants and a large amusement arcade. A floor for conventions is also available, but is seldom utilized. See also Googie architecture Tower Hotel (Niagara Falls), formerly the Konica Minolta Tower Centre Maid of the Mist Fallsview Casino Casino Niagara Clifton Hill List of towers Maple Leaf Village Spanish Aerocar Calgary Tower, a tower in Calgary, Alberta designed similar to the Skylon Tower Images References External links Google Maps aerial photo Images from the Historic Niagara Digital Collections at Niagara Falls Public Library Video: "Skylon Tower elevator ride". YouTube. April 30, 2012. Video: "Populuxe in Niagara Falls (feat. Skylon Tower)". YouTube. August 20, 2012. Towers completed in 1965 Observation towers in Canada Towers in Ontario Googie architecture Buildings and structures in Niagara Falls, Ontario Towers with revolving restaurants Tourist attractions in Niagara Falls, Ontario Modernist architecture in Canada 1965 establishments in Ontario