【原创】北京奥林匹克公园观光塔

        奥林匹克公园观光塔高246.8米，由一座主塔，四座副塔组成，五座钢结构观光塔寓意奥运会五环标志，矗立在鸟巢和水立方北面。每天清晨我都要推窗瞭望一下观光塔，通过观察清晰度就可以估计出北京市今天的雾霾程度。

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