For most of its history this was a fishing settlement, and the fishing never stopped — the Vạn Lộc village festival is still held each year to honour the trade and celebrate a good catch. What changed arrived from a long way away. In the 1980s, aid from the Comecon countries built out the beachfront, and a poor coastal village became one of the north-central coast's principal resort towns within a generation. The result is a shoreline running two economies at once. Cargo moves through the port of Cửa Lò, the most important seaport serving Vinh and the saltwater end of the east–west economic corridor that runs from Myanmar through Thailand and Laos into Vietnam along National Route 7. A short distance along the same sand, the beach fills every summer with families from Vinh and Hà Tĩnh who have made this their nearest sea.

Song Ngư means "two fish," and the name is literal. More than four kilometres offshore, two islands sit together, the taller rising 133 metres above the water and the lower 88, covering about two and a half square kilometres between them. On the island stands Bái Pagoda, built in the 13th century — an upper pagoda and a lower one, each roofed in three tiers, with beams carved into dragons, unicorns, turtles and phoenixes, the four sacred creatures of Vietnamese temple woodwork. Two fish-poison trees, Barringtonia asiatica, are reckoned to be around 700 years old, nearly as old as the pagoda whose courtyard they shade. There is a freshwater well on the island, called Jade Gem. A cable car linking the island to the mainland has been proposed and not yet built, which for now leaves the crossing to boats.

Five kilometres down the beach, at Cửa Hội, the Lam River finally arrives at the ocean after its long run down from the western highlands. The character of the coast shifts as you go. Casuarina stands thicken, the water clears, and the noise of the resort strip falls away; from the sand at Cửa Hội, Hòn Ngư sits directly offshore, close enough to count the two summits. Follow the riverbank inland and you reach the Chàm forest, dense with birds and reptiles. Scattered along this same stretch are the quieter pieces of Cửa Lò that guidebooks tend to skip: Lan Châu islet, known locally as Toad Mountain for its shape, the Cấm River, and the temple to Duke Nguyễn Xí. North of town, the Bãi Lữ resort manages to hold sea, mountain and forest inside a single property.

The figures Cửa Lò carried into the merger were modest: 29.09 square kilometres, a population recorded at 75,260 in 2018, five roads connecting it to central Vinh and a city bus, number 1, that runs the whole way to the main square. Vinh International Airport lies fourteen kilometres off — a mixed military and civil field that handled 1.8 million passengers in 2018 and, between 2002 and 2015, grew its traffic faster than any other airport in the country. What the 2024–25 reorganisation did was collapse a three-tier system into two, taking districts, district-level towns and provincial cities out of the structure entirely. What it did not do was dissolve the identity. Cửa Lò is now one of six wards making up the 166-square-kilometre urban area still generally called Vinh, and the beach signs did not need repainting.