The Marble Mountains in Ngũ Hành Sơn, Da Nang, Vietnam, are a cluster of five marble and limestone hills, each named after an element. These mountains are renowned for their stunning caves, temples, and panoramic views. The site is quite accessible from Da Nang city center, about a 30-minute drive, and no specific tour guide is necessary as visitors can explore at their own pace. However, guided tours are available for a more in-depth historical and cultural context. The best time to visit is during the dry season, from February to May, to avoid slippery paths from rain. Entrance fees are quite affordable, usually around 40,000 VND (approximately $2 USD), with an option for a quick elevator ride (about 15,000 VND) to reach the main summit areas if you wish to avoid the strenuous climb. A visit typically takes 2-3 hours, allowing time to explore the various pagodas, caves, and scenic spots. Wear comfortable shoes and bring water for the hike, and try to visit early in the morning or late afternoon to beat the heat and crowds.