Rock-stacking is one of humanity’s most ancient art forms. But it is also contentious.  Hike far enough on just about any trail in the world, and you’ll likely spot a collection of stones placed atop each other that form impromptu…

In the last couple of decades, the likes of Costa Rica and Panama have transformed Central America into one of the world’s adventure havens. It’s a land scored by smoking mountains, threaded with coconut-dotted beaches and dressed from head to…