A treeline is not one phenomenon. It is wherever a particular limiting factor becomes severe enough, and the factor differs entirely between a mountain, a bog, a coast and a…
The question worth asking at any waterfall is what makes the drop possible, because a river will otherwise smooth its own bed given enough time. Something is preventing that, and…
The pattern is consistent: people assume their own default is the obvious one, discover on the second day that it is not, and treat a difference in preference as a…
The first question at any boundary is what it is made of, because that was decided entirely by what was to hand. The second is what shape it is, which…
The difference between covering ground and seeing a place is mostly about route choice. Everything below is a way of arranging a walk so that the parts between the destinations…
The useful habit is to ask what each feature is for rather than what it looks like. Nearly every one addresses a specific difficulty, and several address problems that are…