On the way down Thuy Son mountain, stop off at the Huyen Khong Cave – used by the Vietcong during the American War. At midday, sunlight streams through an opening in the ceiling, lighting up the cave and its four altars for health, love, money and children. Before leaving the Marble Mountains, visit Am Phu Cave, with its depictions of the afterlife. You can work your way up from "hell" to "heaven" via stairs lined with dozens of Buddhist statues stacked on top of each other in niches in the rock.
Marble Mountains, Nguyen Duc Thuan, Da Nang