Marble Mountains (Vietnamese: Ngũ Hành Sơ n "Five elements mountains") is a cluster of five marble and limestone hills located in Ngu Hanh Son ward, south of Da Nang city in Vietnam. The five 'mountains' are named after the five elements; Kim (metal), Thuy (water), Moc (wood), Hoa (fire) and Tho (earth).

All of the mountains have cave entrances and numerous tunnels, and it is possible to climb to the summit of one of the peaks. Several buddhist sanctuaries can also be found within the mountains, making this a famous tourist destination.

The area is famous for stone sculpture making and stone-cutting crafts. Direct rock extraction from the mountains was banned recently. Materials are now being transported from quarries in Quảng Nam Province.

As of 2003 the district had a population of 50,105 .[1] The district covers an area of 37 km². The district capital lies at Da Nang.[1]