[agurk]

They probably mean Lynetteholmen, which is a giant artificial peninsula to be built on reclaimed land off Copenhagen.

Curiously there's no English wiki page for it, but machine translation is good these days:

https://da.wikipedia.org/wiki/Lynetteholmen

[emptysongglass]

That's the one! Here's a good overview by a Dane on its folly: https://youtu.be/K4icpF0S5BM?si=zjB2qkB-wy-VQu58