伯利兹的大蓝洞(great blue hole)—407英尺深 (约124米深)
great blue hole photos
大蓝洞丨伯利兹great blue hole是目前已发现的全世界最大的水下洞穴
大蓝洞(great blue hole)为一石灰岩洞,全世界最大的水下洞穴,位于中
5公里)处,邻近灯塔礁(lighthouse reef)的大蓝洞(great blue hole)是
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