Whether you’re walking along a city sidewalk or hiking deep in the forest, you might occasionally notice paint marks on tree trunks (or even a metal band once in a while). Those paint marks are codes ...

If you're a hiker, you may know that "blazes" are indicators on trees or rocks that mark your trail. Hikers can make their own temporary blazes using chalk, but there are more permanent ones painted ...

Add Yahoo as a preferred source to see more of our stories on Google. An orange circle painted on a tree in the woods - Mbprojekt_maciej_bledowski/Getty Images It's not unusual to spot markings on ...

Add Yahoo as a preferred source to see more of our stories on Google. Purple paint on tree - Eucalyptys/Getty Images Many people have noticed purple markings on trees in their area, but the ...