The manhole is just an ordinary manhole, and the place Fiona recorded the wind and tide is not a beach but the Kai Tak Cruise Terminal, which was formerly the Kai Tak Airport before 1998.
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HONG KONG – OCTOBER 28: Umbrellas are opened as tens of thousands come to the main protest site one month after the Hong Kong police used tear gas to disperse protesters October 28, 2014 in Hong Kong, Hong Kong. A peaceful safe atmosphere remains at the massive protest site as artists freely express themselves and families bring their children to experience the Umbrella Revolution. (Photo by Paula Bronstein/Getty Images)