Ask me what my favourite experience was exploring the Jurassic Coast and you can be pretty certain that the hike from Durdle Door to Lulworth Cove will grace the top of that list. Scrolling haphazardly through Instagram on a grey winter afternoon some months ago, it was a photograph of this very spot dressed in a dusting of snow that first landed Durdle Door on my radar. Protruding over vivid blue water, eroded by time and nature, the natural limestone…