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北美洲
波特蘭天文台
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緬因
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波特蘭天文台, 波特蘭, 緬因, 美國必遊景點
Built in 1807 this is the last remaining maritime signal tower left in the USA. Local merchants paid the owner a yearly fee and he would watch for the different merchant ships to come into Portland Harbor then would raise the flag of the merchant the ship belonged to so they would know their ship had arrived.
Built in 1807 this is the last remaining maritime signal tower left in the USA. Local merchants paid the owner a yearly fee and he would watch for the different merchant ships to come into Portland Harbor then would raise the flag of the merchant the ship belonged to so they would know their ship had arrived.
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The Portland Observatory, an octogonal 26.2 m (86 ft) high tower on Munjoy Hill, served as a communication station for Portland's harbor until 1923. It was designed to give a competitive edge to ship owners who paid a subscription fee to alert them when their ships were arriving. #Portland #Maine #Landmark #Travel
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