Rock Cairns (U.S. National Park Service)

Resist the urge to build or topple rock cairns - Upworthy

What can cairns teach us about the spiritual journey?

Rock cairns should not be messed with on trails: National Park Service

Should you knock over that rock cairn? It depends where you're hiking

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

The cairns of Acadia: Objects of wonder, subjects of vandals

Kings Canyon Overlook In Giant Sequoia National Monument

Stop the rock-stacking — High Country News – Know the West

Stop The Rock Stacking

Should You Knock Over Cairns or Leave Them? Even the National Park Service Can't Agree. - Backpacker

Yosemite says rock cairns are bad — and you should knock them down - Los Angeles Times

Rock stacking in national parks: Why is it bad?

I Didn't Know That!: Rock Cairns (U.S. National Park Service)

Caring for Cairns at Acadia National Park - American Trails