Cotonou east to the official capital and then west along the whole of Benin's 120-kilometre coast — a town of twenty thousand people built on stilts over a lake, the four kilometres at Ouidah that end at the water, a river mouth that moves — then north up the RNIE2 to the earth-walled palaces of Dahomey at Abomey, an underground refuge village a bulldozer fell into in 1998, and the granite domes at Dassa, which is where this route stops and the notes explain why.
Cotonou
Cadjehoun airport is inside the city, a few streets back from the beach, which sets the tone: Cotonou is not the capital and runs the country anyway. Buy a SIM before you leave the terminal, then give the afternoon to Dantokpa, spread along the channel that links the lagoon to Lake Nokoué and among the largest markets in West Africa — cloth, hardware, medicine, and a section of vodun supplies that is a working shop rather than an exhibit. At dusk go to the Marina for the Amazone, a thirty-metre bronze unveiled in 2022 of an Agojie, one of the women soldiers of Dahomey whom the French insisted on calling Amazons.
Ganvié
Taxi out to the Abomey-Calavi jetty, then three quarters of an hour by motorised pirogue across Lake Nokoué. Ganvié is a town of around twenty thousand Tofinu built entirely on stilts — houses, school, church, bars, a market conducted between boats. It was founded in the seventeenth century by people escaping Dahomey's slave raiders, who by religious prohibition would not follow onto water, which is the whole reason the place exists where it does. The forests of stakes and palm fronds in the shallows are acadja, brush parks that concentrate fish and also silt the lake, and they have been restricted and un-restricted repeatedly. Fees and a guide are fixed at the jetty; agree them before boarding, and ask before pointing a camera at anyone from a boat.
Porto-Novo and Adjarra
Thirty kilometres east, and an hour of it because of the traffic. Porto-Novo is the constitutional capital and the National Assembly sits there; everything else happens in Cotonou. The Musée Honmè occupies the palace of Toffa I, who reigned from 1874 and put his kingdom under French protection in 1883 to get leverage against Abomey — the foothold France then used against Dahomey itself. The Grande Mosquée is the building people come for: raised by Aguda families, freed Brazilians repatriated to this coast in the nineteenth century, in the shape and colours of a Bahian church. Ten kilometres on, Adjarra holds its drum market on the traditional four-day cycle rather than a week.
West to Ouidah, and the route
Forty-two kilometres of the RNIE1. Take a guide from the history museum and walk the road in the order it was walked: Place Chacha, where Francisco Félix de Souza — a Brazilian-born trader whom King Ghezo made viceroy of the port — held the auctions, and where his descendants still occupy the family compound; the Tree of Forgetting; the Zomaï, where people were held in darkness before shipment; the mass grave at Zoungbodji; the Tree of Return; and after four kilometres the Porte du Non-Retour, a memorial arch put up on the sand in 1995 under UNESCO's Slave Route project. Estimates for the number of people shipped from this stretch of coast run past a million. Do it on foot and do it slowly.
Ouidah — the temple, the fort and the forest
The Temple des Pythons keeps royal pythons for Dangbé and stands directly across the road from the Basilica of the Immaculate Conception, which is the town's own joke and also its actual arrangement. The fort behind them is stranger: São João Baptista de Ajudá, built by the Portuguese in 1721, was held as Portuguese territory — a couple of hectares of it, with two men left in residence — until 1 August 1961, when Dahomey took it and the pair tried to set it alight rather than surrender it. Lisbon did not formally accept the loss until 1975, after the Carnation Revolution had ended the dictatorship at home. It is the Musée d'Histoire de Ouidah now. Finish in the sacred forest of Kpassè among the vodun sculptures installed for the Ouidah 92 festival — named for the year it was planned, held in February 1993.
Grand-Popo
An hour further west, towards the Togo border. Grand-Popo is a lagoon town losing an argument with the sea — buildings on the old front have gone into it and the shoreline retreats measurably each year, so the historic Grand-Popo and the one on the map are not the same place. Villa Karo, a Finnish-African cultural centre founded here in 1998, runs a library and an artists' residency and is the best-informed address in town. Swim with care or not at all: the undertow along this whole coast is serious and nothing anywhere is patrolled.
La Bouche du Roy
Half a day on the water. A pirogue runs down the Mono to the mouth where it meets the Atlantic — a channel that shifts position, mangrove on both sides, and a sandspit where olive ridley turtles nest between roughly November and March. The estuary sits inside the Mono transboundary biosphere reserve, added with Togo to UNESCO's Man and the Biosphere network in 2017, and the patrols and the fishing rules are run by the villages rather than by a park authority. Go early; the wind gets up over the open water by the middle of the day.
Lake Ahémé, then north to Abomey
North-east along the lagoon to Possotomé on the west shore of Lake Ahémé, where the spring that supplies the country's main bottled-water brand comes out of the ground and the fishermen work the same acadja brush parks as at Ganvié. Then inland through Lokossa and Klouékanmè onto the plateau — a hundred and ten kilometres of tar and a slow, complete change of country, from lagoon and palm to red earth and shea. Arrive at Abomey with the afternoon left.
The palaces of Abomey
Twelve kings between 1625 and 1900 built here, each adding his own palace inside the same earth walls, over some forty hectares. UNESCO inscribed the site in 1985 and put it on the List of World Heritage in Danger in the same year, after a tornado had gone through it in 1984; it stayed on that list for twenty-two years and came off in 2007. The museum occupies the palaces of Ghezo and Glele, and the bas-reliefs on the walls are the kingdom's own record of itself — battles, sayings, the emblem of each reign. Béhanzin set fire to the place himself in 1892 as the French closed in, and General Dodds's troops carried twenty-six objects out of the ruins. Those objects are back in Benin and they are not here; read the notes before you build a day around them. In the town, the Yemadjé workshops still cut and stitch the appliqué banners that told the same history in cloth.
Agongointo, then the Collines
A quarter of an hour down the road at Bohicon, in February 1998, a bulldozer working on a Danish-funded bypass broke through into a chamber ten metres underground. The survey that followed found more than fifty of them: rooms cut into laterite with ventilation shafts and connecting passages, used as refuges during the wars of the plateau. Agongointo-Zoungoudo is an open-air museum now and takes an hour. Then north on the RNIE2 to Dassa-Zoumè, an Idaasha royal town scattered among granite domes — the count everyone gives is forty-one hills. The grotto of Notre-Dame d'Arigbo above it is Benin's national Marian shrine and fills with tens of thousands of pilgrims each August. Walk up one of the domes in the last hour of light.
Savalou, and south to the flight
Thirty-five kilometres west to Savalou, the royal town of the Mahi, whose palace is still occupied and whose fixed point in the year is the yam festival in mid-August — a harvest that may not be eaten until the king has eaten it. This is the top of the route. Everything beyond the Collines is covered by the security notes below, and that is a real loss rather than a formality: Pendjari and the W hold the elephants and the largest surviving population of West African lions, and they are shut. Then south on the RNIE3 to Bohicon and down the RNIE2 to Cotonou — about two hundred and forty kilometres, four and a half hours with the run into the city at the end of it. If the evening survives it, the Fondation Zinsou gallery and grilled fish at Fidjrossè.
Good to know
Most non-African nationals need a visa arranged before departure through the government portal at evisa.bj — around US$55 for a single entry, usually issued within a couple of working days, and airlines check it at the gate, so carry the printout. African passport holders are the exception: Benin scrapped short-stay visas for nationals of the continent in 2017, one of the first countries to do it, and stays of up to ninety days need no visa at all. A yellow fever certificate is demanded of arrivals from countries with a risk of transmission, and that includes anyone who has merely transited an airport in one, which covers most routings from Europe through a West African hub; Benin is itself a transmission-risk country, so take the vaccination regardless. It must have been given at least ten days before you land, and since 2016 the certificate is valid for life with no booster permitted. Malaria is the medical question that actually matters: transmission is year-round across the whole country, and nothing in Benin is high enough to give you relief from it, so take prophylaxis for the full trip and keep taking it after you leave. The working language is French and there is very little English outside a hotel desk; Fon on the coast and the plateau, Yoruba in the east and around Dassa. The currency is the West African CFA franc, pegged to the euro at a fixed 655.957, so there is no exchange-rate risk for anyone coming from the eurozone — but this is a cash country for the things this route buys. Pirogues, shrine visits, village guides and museum entries all want notes; ATMs are reliable in Cotonou, Porto-Novo, Bohicon and Abomey and thin after that, and MTN or Moov mobile money covers most of the rest once you have a local SIM. Hire a car with a driver rather than driving yourself. It is not expensive, the main roads are good — the RNIE1 along the coast and the RNIE2 north through Bohicon are tarred throughout — but Cotonou traffic and the zémidjan motorbike taxis that constitute most of it are not something to learn on, and nobody should drive anywhere in this country after dark: no lighting, no hard shoulder, livestock and unlit vehicles. The south has two wet seasons, a main one from about April to July and a shorter one in September and October; the north has a single one from May to September. The laterite tracks to Possotomé and the Bouche du Roy landings are the parts that suffer. From December to February the harmattan carries Saharan dust south — cooler nights, flat hazy light. On vodun: shrines and convents are private and a fee with a named guide is the normal and correct way in, ceremonies are not scheduled for visitors, and the answer to photographing people at one is usually no and should be accepted the first time. The 10th of January is a national public holiday, the state festival built on it now runs over the 9th and the 10th, and Ouidah is extremely full for both — book months out or stay in Cotonou and travel in. Two things to check rather than assume. First, the twenty-six royal treasures returned by France in November 2021 were exhibited in Cotonou in 2022 and are now in store at the Marina, waiting for the Museum of the Kings and Amazons of Danxomè, a French-funded building going up inside the palace site at Abomey with an opening date currently given as 2027 — so at the time of writing you cannot see them at Abomey, and it is worth asking where they are before you plan around it. Second, the north. British and other foreign-office advice is against all travel to the Pendjari and W national parks, the hunting zones attached to them and everything within five kilometres of the Burkina Faso border, and against all but essential travel to the rest of the Alibori and Atacora departments, because armed groups have pushed south out of Burkina Faso and Niger since 2021; an attack on two army positions inside the W park in April 2025 killed fifty-four soldiers. The parks have been effectively closed to tourism since two French visitors were kidnapped in Pendjari in 2019 and their Beninese guide killed. Nothing in this route goes near any of it — Savalou and Dassa are in Collines, well to the south — and the overland crossings to Niger and Burkina Faso are not usable options; the practical land border is Togo at Hillacondji, fifteen kilometres past Grand-Popo. Read your own government's advice the week you travel rather than the month you book.
Shorter or longer?
Four or five more days instead of turning north. Hillacondji is fifteen kilometres past Grand-Popo and Lomé another hour and a half beyond it, with Aného's lagoons on the way; then Togoville, where the Germans signed their 1884 protectorate treaty and where the vodun of this coast carries on unbothered by the frontier, and the hills and waterfalls behind Kpalimé. Togo issues short visas on arrival, but confirm the position for the land border before you walk across it.
Cotonou, Ganvié, two nights at Ouidah, Grand-Popo and the Bouche du Roy, then straight up to Abomey for the palaces and back down the RNIE2. Keeps the lake town, the whole of the Ouidah route and Dahomey's capital; cuts Porto-Novo, Lake Ahémé and everything north of Bohicon.