Start by naming any country that France borders. Then name any country that borders any of those countries. Then keep going until there are no more countries left to name.
Halfway up the photo, in white, is Latin Bridge over the Miljacka River, where Gavrilo Princip killed Archduke Ferdinand and triggered World War I. Princip denied being the cause of the war, saying it would have happened anyway. He was spared the death penalty, and died in prison, aged 23, of tuberculosis.