Making an impression

Impressions in sand.

Touch is a reciprocal action, a gesture of exchange with the world. To make an impression is also to receive one, and the soles of our feet, shaped by the surfaces they press upon, are landscapes themselves with their own worn channels and roving lines. They perhaps most closely resemble the patterns of ridge and swirl revealed when a tide has ebbed over flat sand.

~ Robert Macfarlane, The Old Ways: A Journey on Foot

Making their own impressions.