This island nation, known for its northern lights and geothermal dynamics, was also the scourge of banking during the 2008 financial crisis.

But that appears to be old news for this Nordic oasis to Wall Street and London bankers, as cranes fill the sky in the capital city.

It’s so hot that even McDonald’s is following the bankers back to booming Iceland.

“You’ve heard about our tourism boom,” Sigurdur Hannesson, chief executive of the Federation of Icelandic Industries, told The Post.

“Not very long ago we had a half-million visitors each year — and now that’s risen to about 2-and-a-half million. It’s happened in such a short time span, we’ve had to make new investment in infrastructure, mainly in hotels. But we’re still behind, particularly in Reykjavik.”

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