Carins are found all over the world, in uplands, on hiking trails, on sea cliffs in deserts....all over the place!
They vary in size some are very small and some are crazy big.
In Korea we see them on every.single.trail we hike.
There are more when there is a Buddhist temple on the hike.
There are many different reason for one to build a carin, so do it as a ceremonial gesture, some in prayer, some put them on ancestors graves, but for me, I go with the belief that carins bring good luck to those that build them, or add to existing carins.