An enclosed hexagonal volume conceals a 6-sided path on which many things happen: jungles of poles to cross, large pipes to climb over, peepholes to peek at what awaits at the end of the path, ups and downs.
The interior space swells and shrinks, brightens and darkens, grants glances skyward, demands attention and commitment, until the ultimate prize: an impassive life-size horse to ride on. What does the horse have to do with it? Nothing, of course.