Dark Mountain is a movement, sort of. Started by Dougald and Paul, their webpage is dark-mountain.net.
When I learned about the project, I thought maybe the notion was about a path between two mountains, leading to a valley on the other side. You walk upwards, not knowing where you go. Maybe you can whistle while you climb.
So in that mood I recorded a few chords, simple but with a small twist at the end, and then I immediately improvised the melody on top of it. I haven't been able to find the individual tracks, or the mix would be better, as in panned so that maybe I could learn what it was that I did. Whatever - improvised it stays.
The image is cut off from a mind-map about projects: do you want to start with something to look for?