Which building, Olympic Tower or Latting Observatory, is no longer erect?
Latting Observatory The Latting Observatory was a wooden tower in New York City built as part of the 1853 Exhibition of the Industry of All Nations, adjoining the New York Crystal Palace. It was located on the North side of 42nd Street between Fifth Avenue and Sixth Avenue across the street from the site of present-day Bryant Park. Conceived by Waring Latting and designed by architect William Naugle, the observatory was an octagonally-based, iron-braced wooden tower 315 ft high adjoining the Crystal Palace, with landings at three levels on the structure, allowing visitors to see into Queens, Staten Island and New Jersey. The tower, taller than the spire of Trinity Church at 290 ft , was the tallest structure in New York City from the time it was constructed in 1853 until it burned down in 1856. The tower's base was a 75-foot square, tapering to a top of six to eight feet. It could handle up to 1,500 people at a time.
Euromast Euromast is an observation tower in Rotterdam, Netherlands, designed by Hugh Maaskant constructed between 1958 and 1960. It was specially built for the 1960 Floriade, and is a listed monument since 2010. The tower is a concrete structure with an internal diameter of 9 m and a wall thickness of 30 cm . For stability it is built on a concrete block of 1900000 kg so that the centre of gravity is below ground. It has a "crow's nest" observation platform 96 m above-ground and a restaurant. Originally 101 m in height it was the tallest building in Rotterdam. It lost this position to the high-rise of Erasmus MC (113.5 m ) which was completed in 1968, but regained it when the Space Tower was added to the top of the building in 1970, giving an additional 85 m . Euromast is a member of the World Federation of Great Towers. In 2008 and 2009, the tower hosted an extreme sports event which featured BASE jumping.