This work is a map - the topography of the Overland Track in Tasmania. Dove lake in the north (top), to Lake St Clair in the south (bottom). It's a place I've spent a lof of time in, and introduced many people to as a guide.
It's blue, because Tasmania is so often known as the green island - so why not a blue variant! It is also a cartographic exercise in how to highlight features in the landscape.