Dark places in South Africa are diminishing at a alarming rate, I suppose in other parts as well, but one of the darkest places I ever visited lately was "Jakkalse gat" (fox's hole), it is a hunting cabin under Bortle 1 sky, you can see no lights from anywere for 360 degrees, a slight glow from towns in the distance. It has solar electricity, gas stove and very important a indoor fire place because it gets very cold there!
https://www.lekkeslaap.co.za/accommo...jakkals-se-gat