Inspiration for this exercise came once more from the works of Tolkien.
He describes in his Silmarillion Elven Realms hewn into stone in the likeness of Trees and Nature.
Additionally I find the idea of an immortal race, which builds these incredible structures and then simply vanishes from the world weirdly beautiful.
I tried to create an atmosphere which reflects the Elves love for nature, and a kind of romanticised image of forgotten architecture.