We were about to reboard the bus for another ninety minutes, to snatch a photo of the Leaning Tower of Pisa.

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The sculpture is taller than the Angel of the North, in Gateshead, and leans at a greater angle than the Leaning Tower of Pisa in Italy.

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"Every single one of them used Italian flags, the Leaning Tower of Pisa and an Italian accent when they were reading the storyboard to me, " she said.

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Florence is the regional capital, but other renowned cities and town such as Pisa and its leaning tower or Lucca with its fortress walls add their own particular history and charm.

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If not for the level, you'd have to walk uphill to cross your bedroom, pencils would roll right off your desk and the Empire State Building might look like the Leaning Tower of Pisa.

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Global landmarks that are going green on 17 March include Niagara Falls, the Leaning Tower of Pisa, Burj al Arab in Dubai, Table Mountain in South Africa, New York's Empire State Building and Berlin's TV Tower.

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In her chapter on Galileo, Ferguson tells us that the arrogant, self-promoting Italian did not invent the telescope, and it is doubtful he conducted the legendary display of dropping weights from the Leaning Tower of Pisa.

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"It was an incredible sight: the control tower was leaning perilously, " the port's nightwatchman told La Repubblica newspaper.

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In October, Prof John Burland, a construction expert from Imperial College London who oversaw the building of the car park, said the tower was leaning, but it would not be a major concern for at least 10, 000 years.

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