If you're hiking along a trail in a national park and you see a rock pile, don't touch it: Cairns are often directional tools set up for hikers.
USA TODAY, Press & Sun-Bulletin
Thu, 07/13/2023 - 1:28pm
If you're hiking along a trail in a national park and you see a rock pile, don't touch it: Cairns are often directional tools set up for hikers.