Rock Cairns (U.S. National Park Service)

Rock Cairns, Trail Work - White Mountain National Forest New Hampshire

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

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

Yosemite asks visitors to stop building, knock over rock cairns – NBC Bay Area

Stacking rocks leaves nature in the balance

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

Vandalism in Acadia taints popular mountains and trails - Acadia National Park on My Mind

Balancing Act: The History of Rock Cairns and Why Stacking Rocks is Discouraged in Zion

Rock Cairns (U.S. National Park Service)

Vandalism in Acadia taints popular mountains and trails - Acadia National Park on My Mind

Don't Move Rocks! Friends of the Smokies

Rangers, walking groups, urge public to stop making rock towers on hiking trails - ABC News

Stop The Rock Stacking

What Are Cairns? And Why Should You Leave Them Alone?