Good morning,
A couple of nights ago I visited this location, a dam neat the town of Santa Clara Velha (Odemira district, South Portugal). This area is located towards the interior, but still relatively close to the coast (about 60 km or so). It is a forested area, with very sparse houses, so it is pretty dark.
I normally try to shoot the sky when there is a New Moon, but I usually do it on the coast, because it is closer to my house. However, there is some light pollution, as the coast is more inhabited.
This time I spent one night in this town, with the family, in a small Turismo Rural, old farms that have been recuperated for tourism. Very nice, and one of the ways to avoid complete human desertification in these areas. But I digress...
So I went out to shoot a 2 hour star trail (which is what you see here): exposure was 4 minutes, f4, 400 ISO, total 30. Pretty simple. There was some light pollution from another Turismo Rural in the northern end of the dam, and a couple of cars going through some dirt roads.
But pretty dark overall; when I finished the star trail, I wanted to shoot the Milky Way, but the clouds set in, so no luck this time.
Regards.