Cửa Tùng beach sits where the Bến Hải River flows into the sea, in the north of Quảng Trị province. About 4 km of fine sand runs along a gently sloping shore backed by red basalt soil. Two rocky headlands, Mũi Si and Mũi Lay, reach out into the sea and shelter a small bay, which keeps the water calm and clear for much of the year. Seen from above, the series of red basalt headlands pointing out to sea looks like a giant comb.
About a century ago, the French developed Cửa Tùng as one of central Vietnam's leading resorts, with European-style hotels and a church on the hill, and it was nicknamed the "Queen of Beaches". Its fortunes have changed since. From around 2003, construction at the Bến Hải river mouth - a bridge, a fishing port and breakwaters - altered the currents, and erosion washed away much of the sand.
The beach became narrower and steeper, part of it turned into a mooring for fishing boats, and visitor numbers fell. Studies are under way to restore the beaches. At the foot of one headland, fishermen still tend the graves of whales washed ashore, following the local tradition of whale worship.