Rock Cairns (U.S. National Park Service)

Please don't stack rocks on your next hike. Here's why. - Lonely Planet

Stacking stones 'not allowed' in Texas: This is why rock cairns are prohibited at Lone Star State parks, authorities say

Rock stacking in national parks: Why is it bad?

What Are Cairns and Why Shouldn't You Make One? - CampEasy Iceland

Making rock stacks upsets habitats, cairns are different, LNT

What are Rock Cairns & Why You Shouldn't Build Them – Bearfoot Theory

Should you push over these stacks of rocks? Here's what NPS says you should do

Please don't stack rocks on your next hike. Here's why. - Lonely Planet

See a Rock Cairn? Push It Over, Yosemite National Park Says