I was in Norway last month, driving a lot (from Kristiansand to Nordkapp).

And I was surprised about some construction looking like a tunnel, but “connected” to lake.

First thought: a submarine tunnel, but Suldalsvatnet is not connected to sea.

Google Streetview: [https://goo.gl/maps/EPgidmn5N3iPSD6b7](https://goo.gl/maps/EPgidmn5N3iPSD6b7)

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What that can be?

by Mike-Mark

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