Port Vila is built on a reef that is still rising.

From the air, Port Vila does not look like the capital of a volcanic country. There are no cones, no long slopes, no mountain behind it. There is a green, almost horizontal surface that reaches the water and stops dead, and on top of it the city, a bay and two small islands inside the bay. That flat surface is not a plateau. It is a reef that stopped being underwater.

01 Steps of coral

The island's basement is volcanic — Pleistocene basalts and trachydacites — but resting on it, discordantly, are uplifted Quaternary reefs. Coral limestone that grew at sea level and now stands above it, in steps. Those steps are the dominant feature of the landscape across the whole western half of Efate.

A study published in Marine Geology in 1990 dated thirty-five corals in growth position by the uranium-thorium method and confirmed high sea levels around 82,000, 103,000 and 125,000 years ago. Its authors divided the western half of the island — the side Port Vila is on — into four sectors moving at different speeds. In the north-western sector, a broad terrace formed about 180,000 years ago slopes northward from 80 down to 50 metres. The average uplift rate there runs between 0.2 and 0.6 millimetres per year.

Six tenths of a millimetre a year is six centimetres a century: nothing anyone could notice. Over a hundred thousand years it is sixty metres. And sixty metres is exactly the order of magnitude of the ground the city stands on: the municipality's official elevation is 59 metres. Port Vila is not on a hill. It is on the sea floor of a hundred thousand years ago.

02 A bay with two islands inside it

Vila Bay is the country's main harbour and the centre of its trade. It is deep almost to the shoreline, which explains the image that recurs in every photograph of the city: a cruise ship anchored inside the water, a few hundred metres from the waterfront. For early 2026 the authorities expected 125 cruise calls in the country.

There are two islands inside the bay, and it is worth telling them apart. Iririki, the one you see from the promenade, is occupied by a resort and is five minutes away by launch. Ifira is smaller, sits further in, and explains something you cannot see: a large share of the customary landowners of the ground the capital grew on live there. Port Vila was built on land that never stopped having recognised owners, and that is one of the reasons the city spread along the coast rather than inland.

03 Forty-nine thousand people on 23.6 square kilometres

The municipality covers 23.6 square kilometres. In the 2020 census it held 49,034 people: 2,080 per square kilometre and 16.3 per cent of the country's entire population. Nowhere else in Vanuatu comes close, and the concentration is recent: it is the city that has grown, not the archipelago that has emptied at the same rate.

The city occupies the neck of land between two bodies of water, the bay to the north and Erakor lagoon to the south. That is why you cross it lengthwise rather than widthwise, and why from almost any street on high ground you can see water on both sides. The streets climb the limestone step in short, dry rises: the upper neighbourhoods look down towards the harbour, and the commercial part is squeezed into the flat strip along the shore.

The country speaks 138 indigenous languages, the highest density of languages per head in the world. Almost all of them meet in this city, which is why Bislama — the English-based creole that works as a bridge — is here the first language of most people. It is practically the only place in the archipelago where that is true: on the islands, each community still speaks its own.

04 17 December 2024, at 12:47

The uplift is not a steady drip. It arrives in jolts, and one of them is recent.

At midday that day, a magnitude 7.3 earthquake at a depth of 54 kilometres struck about 8 kilometres off the western coast of Efate. The mechanism was oblique-normal faulting within the subducting Australian plate itself, which is sinking beneath the New Hebrides plate at roughly 170 millimetres a year. It is the same machinery that made the terraces, running live.

At least fourteen people died and 265 were injured. Ten buildings collapsed in the centre, some of them pancaking; two bridges came down; more than three hundred aftershocks were recorded, the largest magnitude 6.1 on the 22nd. The damage was put at US$231.7 million — 29 billion vatu — and directly affected 116,000 people, close to a third of the country.

The centre stayed closed for nearly four months and twenty-five buildings were demolished. The municipal market, badly damaged, was repaired and reopened on 28 July 2025. It is worth knowing before you arrive: in 2026 the city works, but its most photographed part still has empty lots where buildings used to stand, and business people from the centre itself admit the area has not got its life back.

05 How you get around

Urban transport means minibuses whose number plates start with a B. They have no fixed route and no stops: you raise a hand from the roadside, say where you are going, and the driver fits it into the run he was already making with other passengers. Inside the city the fare is flat, 150 vatu per person, in cash. Taxis carry a T and the price is agreed before you get in.

Outside the city only one road matters, the ring that goes round Efate. And you enter the city through a single point, Bauerfield airport, whose runway and control tower were also damaged in 2024 and stayed closed to non-humanitarian flights for seventy-two hours.

That is the real scale of the place. A country of 138 languages and eighty inhabited islands depends on a strip of raised reef twenty-three square kilometres across, with one harbour, one runway and one road. The ground rises about six centimetres a century, almost always without warning and occasionally all at once.