Rock cairns have been around for a long, long time, all over the world. They mark trails, graves, etc. But in recent years, stacking has become much more ubiquitous.

If you're hiking along a trail in a national park and you see a rock pile, don't touch it: Cairns are often directional tools set up for hikers.

Local News Smokies rangers: Moving rocks affects salamander habitats in park Those artsy stacks of rocks, known as rock cairns, actually negatively affect the animals that live in the water.

An amateur archaeologist from Oxfordshire named Hamish Fenton stumbled upon the oldest animal rock carvings in Scotland, possibly even the oldest of their type in the entirety of the United Kingdom.

Conservationists Want You to Stop Building Rock Piles Cairns have a long history and purpose, one that newer stacks sometimes subvert ...

The cairn controversy continues, and while Yosemite rangers have given visitors the green light to knock them down, other national parks have not. Cairns are rock formations in which rocks are ...

When Jim Ayers first created his first cairn, Periwinkle Cove was a blank canvas. Now, Rock Sculpture Point in Rye, New Hampshire, is a bona fide destination, as profiled in Yankee Magazine.

An example of a small navigational rock cairn at Canyonlands National Park, where hikers use these as trail guides. Photo courtesy of the National Park Service and Neal Herbert.

Boy, 5, seriously injured after rock thrown through train window in Cairns North A five-year-old boy has been seriously injured after a rock was thrown at his head in a bizarre train incident ...