To overcome this, the designers developed a structure that is partly submerged in a manmade lake.

为了克服这个问题，设计者开发了一种结构，它部分地淹没在人工湖中。

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After warming up in a Finnish sauna -- a national tradition -- guests don socks for a 50m, often naked run through the snow to a manmade hole in the ice, where they can safely use a step ladder to dip in the icy lake waters below.

BBC: Finland��s native S��mi adventures