Stone piles have various functions in different cultures. Piles of stones are found all over the world in uplands, on moors, on mountaintops, near waterways, on sea cliffs and also in barren desert. Mountain climbers add a stone on top of the pile to mark their achievement. Stone piles can be painted or decorated, for religious reasons or for increased visibility. Vagabonds have used stacked stones as a tool for navigation to mark paths and routes so that other can follow the safe paths. The significance of piled stones in human history is fascinating - and therefor the phenomenon has been used as a source of inspiration for the design process.