Out in the wood is a small area that is just full of rocks. People like to stack them in little towers. This visit, there was a string of flags hung up over the rock pile. I'm really not sure what the flags are.
Not sure either but when my Teenager trekked to Everest Base Camp, he came back with many photographs of Tibetan prayer flags that were in colours like these and they symbolized sky, air, fire, water and earth. Fascinating thing to come across on your hike.