I used to find them nice and decoratve but I've learned recently (two years ago !) that pebbles protect the shore.
(You can read it here in a BBC news article)
https://www.bbc.com/news/uk-scotland-45146681
Moving and stacking them weakens the coastline and distubs the local ecosystem.
Cairns are probably useful and make sense in the mountains or in the deserts, but not here.
Camaret - Dimanche 21 octobre 2018
#stone #pebbles #balance