Overpass is about what it means to move through the landscape. Walking along a vast network of centuries-old footpaths through the English countryside, artist Sam Contis focuses on stiles, the simple structures that offer a means of passage over walls and fences and allow public access through privately owned land. In her immersive sequences of black-and-white photographs, they become repeating sculptural forms in the landscape, invitations to free movement on one hand and a reminder of the history of enclosure on the other. Made from wood and stone, each unique, they appear as markers pointing the way forward, or decaying…