Even today, a century after the start of the Great War, the countryside still bears scars. In this image by Irish landscape photographer Michael St. Maur Sheil at the site of the Battle of the Somme, in northern France, you can trace grass-covered trenches and pockmarks from exploded bombshells. More than a million men were wounded or killed in the battle, the first major British offensive of the war. “The Germans had been sitting in a deep dugout excavated into the chalk rock,” Sheil says. “British soldiers advancing across the flat landscape were an easy target.” His exhibition, “Fields of Battle—Lands of Peace,” now on display in Paris along the wrought-iron fence of Luxembourg Gardens and later touring the United Kingdom, includes 79 contemporary photographs of World War I battlefields—the artist’s attempt to document the enduring legacy of the war on the landscape.