The Marble Mountains, or Ngũ Hành Sơn, are a cluster of five marble and limestone hills located in Ngũ Hành Sơn District, south of Da Nang city in Vietnam. Named after the five elements—metal, water, wood, fire, and earth—these hills are renowned for their stunning beauty, intricate cave systems, and numerous Buddhist sanctuaries. Visitors can explore the caves, enjoy panoramic views from the peaks, and discover the rich spiritual heritage of the area. This site is not only a natural wonder but also a place of historical and cultural significance, offering a unique blend of Vietnam's geology and spirituality.