Eiffel Tower was to be dismantled in 1909, when its ownership would revert to the City of Paris. The City had planned to tear it down (part of the original contest rules for designing a tower was that it should be easy to dismantle) but as the tower proved to be valuable for communication purposes, it was allowed to remain after the expiry of the permit. Eiffel made use of his apartment at the top of the tower to carry out meteorological observations, and also used the tower to perform experiments on the action of air resistance on falling bodies. For the
Observation tower is a support pillar of the aerial tramway in Barcelona. It is equipped with an observation deck. The Blackpool Tower (still standing) and the New Brighton Tower (demolished) resembled smaller versions of the Eiffel Tower, while Watkin's Tower at Wembley, if completed, would have been taller than the Eiffel Tower. The i360 in Brighton is a 162-metre (531 ft) observation tower and the world’s first vertical cable car. Enger Tower, Reunion Tower, Seattle's Space Needle, Gatlinburg, Tennessee's Space Needle and the Tower of the Americas are some examples of observation towers in the United States. Joachim Kleinmanns: Schau ins Land.