Take a trip to Alaska, northern BC, Norway, etc.
There's a particular observatory in Hawaii that is supposed to be amazing.
I'm sure there's plenty of other spots!
Fort Davis Texas at the McDonald Observatory is one of my favorites! The link below gives you a pretty good idea on how bad or good your night sky is.
Good luck getting clear skies in Norway.
Seriously. I moved here. Even northern lights can be elusive due to this (plus, I live in a city). And where I live, I can read outside at night so the best time to see dark is during the cold times.
But more to the point, there is a lot of light pollution here. The best places are inland and plenty of other places get much darker. If you want to check out dark places, I've linked a light pollution map.
https://www.lightpollutionmap.info/#zoom=3.67&lat=66.1877&lo...
Most of the US West of the Missisipi is still largely dark.
https://www.lightpollutionmap.info/#zoom=3.68&lat=40.8496&lo...