It takes about 3 minutes to walk from JR Hiroshima Station, or 15 minutes to Hiroshima Railway Hiroshima Station on Line 2, 3, 6 and 7, and then to get off at the Front Station of the Original Explosion Dome Pavilion. In August 1945, the United States dropped an atomic bomb over Hiroshima. The roof and ground structure of the building were completely destroyed, and all the walls above the first floor collapsed. Because the blast falls vertically from above. Because the storms generated by the atomic bomb came almost from the top, only the central part of the main building was protected from collapse. Nearly all the buildings near the explosion center were flattened. Only the dome barely stood and did not collapse. Later, it formed the shape of the dome that now shows the steel frame.