Why Stacking Rocks in Nature is Harmful at Illinois State Parks

Stacking rocks, also known as cairns, might seem like a harmless and fun way to leave your mark on a hike, but it can actually cause serious harm to the natural environment.

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

Texas State Park officials warn to not stack rocks at the parks

PDF) Project-Based Field Trips to the Starved Rock Area for Geoscience Educators, Northern Illinois

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CATALYST PLANET - Why Creating Rock Cairns is Dangerous and Wildly Illegal

CATALYST PLANET - Why Creating Rock Cairns is Dangerous and Wildly Illegal

CATALYST PLANET - Why Creating Rock Cairns is Dangerous and Wildly Illegal

Scientists Say: Hey, Hikers, Stop Stacking Rocks!