Today, we celebrate International Mountain Day, an event to honour the towering giants of our planet. Among them are the Tre Cime di Lavaredo, or the "Three Peaks of Lavaredo," seen on the right in today"s image. A part of the Sexten Dolomites in northeastern Italy, they"re one of the most famous mountain groups in the Alps. These three peaks—Cima Grande, Cima Ovest and Cima Piccola—are a UNESCO World Heritage Site that captivates adventurers and nature lovers alike. During World War I, the front line between Italy and Austria-Hungary cut through the peaks, leaving the area with many remnants of the conflict, such as fortifications, trenches, tunnels and commemorative plaques.