Cairns: stacked stones that serve as markers. To bygone civilizations, they marked burial places and sacred ground. Today, they guide hikers along paths where signposts are impractical.
Until the artistic or mischieviously inclined pass through and mark their passing or start a game of boulder jenga. For the Leave No Trace crowd, this is treasonous. The extra markers harm the habitat of the native creatures and confuse hikers.
Terrain gave me the chance to explore the usefulness of cairns and the debate surrounding them. Hope you enjoy it.