Rangers, walking groups, urge public to stop making rock towers on hiking trails

Cathy Gatley recently came across this "intensive" rock stacking work in Cania Gorge National Park. (Supplied: Queensland Parks and Wildlife Service)

Stacking rocks on a picturesque hiking trail may seem like a harmless act, but rangers and walking enthusiasts say the practice is doing more damage than we think, and they want to put an end to it.