Hiroshima, a modern city on Japan’s Honshu Island, is best known as the first city in history to be targeted by a nuclear weapon when the United States Army Air Forces (USAAF) dropped an atomic bomb on the city at 8:15 a.m. on August 6, 1945, near the end of World War II. Before World War II, Hiroshima's population had grown to 360,000, and peaked at 419,182 in 1942. Following the atomic bombing in 1945, the population dropped to 137,197. By 1955, the city's population had returned to pre-war levels. The Japanese city of Hiroshima may have been devastated by the atomic bomb almost 70 years ago, but today, this site of the destruction is one of the top tourist destinations in the entire country. Statistics released by the nation's tourist agency revealed that around 363,000 visitors went to the metropolis during 2012, with US citizens making up the vast majority of that figure, followed by Australians and the Chinese. Today, Hiroshima Peace Memorial Park commemorates the 1945 event. In the park are the ruins of Genbaku Dome, one of the few buildings that was left standing near ground zero. Other prominent sites include Shukkei-en, a formal Japanese garden, and Hiroshima Castle, a fortress surrounded by a moat and a park.