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.

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

Danger! Stop Stacking Rocks In New York State Parks!

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

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Can You Collect Rocks in State Parks? All 50 States Answered – Rockhound Resource

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Here's why stacking rocks in Texas state parks isn't allowed

Why You Shouldn't Stack Rocks In The National Parks - Camper Report

What's the Deal With These Piles of Stacked Rocks in Maine?

Leaving No Trace: Rock Stacking

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Rock stacking in national parks: Why is it bad?

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Starved Rock an impressive natural monument outside Chicago