There are lots of trends on social media. Cairns or rock stacking is seen by some as a way to leave your personal mark where you’ve visited. Unfortunately, it also leaves some critters homeless. Carving your initials in a tree, rock or cave may seem harmless but it is permanent. Take a picture of yourself with the tree, rock or cave and leave everything like you found it for the next visitor. Extreme selfies may look like a fun idea but when you end up with your leg in a cast or worse it won’t be fun anymore.