Nagasaki is the capital and the largest city of Nagasaki Prefecture located at the south-western coast of Kyushu. Nagasaki lies at the head of a long bay which forms the best natural harbor on the southern Japanese home island of Kyushu. The main commercial and residential area of the city lies on a small plain near the end of the bay. Two rivers divided by a mountain spur form the two main valleys in which the city lies. The heavily built-up area of the city is confined by the terrain to less than 4 square miles out of a total of about 35 square miles in the city as a whole. The city was rebuilt after the war, albeit dramatically changed, as any city would be after such colossal damage. New temples were built and new churches as well, since the Christian presence never died out and even increased dramatically after the war. Some of the rubble was left as a memorial, such as a one-legged torii gate and a stone arch near ground zero. New structures were also raised as memorials, such as the Atomic Bomb Museum. Nagasaki remains first and foremost a port city, supporting a rich shipping industry and setting a strong example of perseverance and peace.