Pedra de Lume

Overview

Pedra de Lume is a field of salt evaporation pans inside the crater of an extinct volcano on the east coast of Sal, about 5 km east of the island capital, Espargos. You reach the pans through a tunnel cut into the crater wall, pay at a booth outside it, and float on your back in water dense enough to hold you up without effort. The salinas, the crater and the neighbouring hill Cagarral together form a protected landscape covering 8.02 square km.

What the crater is

Cabo Verde’s own submission to the UNESCO tentative list describes the crater as the product of a phreatomagmatic explosion that left a bowl roughly 1,100 m across, and calls it the most significant geological formation on the island. Salt covers about 40 hectares of the floor, and the rock salt bed beneath it has been estimated at some 50 million tonnes.

How the salt got there is not settled, and it is worth knowing that before a guide tells you otherwise. The tentative-list dossier says fissures opened in the surrounding rock in the late Pliocene, letting seawater from the bay 1.5 km away seep in and evaporate. A long-standing history of Sal takes the opposite line, reporting that geologists trace the water in the crater to a deep underground source rather than to lateral infiltration from the ocean. Both accounts end in the same place: standing water so loaded with salt that you cannot sink in it.

The colours are the reason people photograph the place. The pans read white, pink and rust against dark volcanic rock, and the tone shifts with the light and with how much water sits in each basin. Wrecked machinery from the industrial era still stands at the edges, including the timber pylons of the aerial ropeway that once carried salt out over the rim.

The village below

Down at the shore, about 1.5 km from the crater, Pedra de Lume village is a small place with a port, a Roman Catholic chapel finished in 1853 and a lighthouse finished in 1855. A history of the island counted roughly 700 full-time residents here in 1990 and only 22 year-round jobs, which is why so many families left for Espargos, Santa Maria or abroad. It stays quiet. Most people who visit the crater never walk down to it.

History

Salt is why anyone lives on Sal at all. Portuguese navigators sighted the island in 1460 and called it Chã, meaning flat; the name changed to Sal once the salt ponds were found, and for three centuries the island stayed almost empty, with no fresh water and nothing to farm.

Martins and the tunnel

Permanent settlement at Pedra de Lume dates from 1796, when the merchant Manuel António Martins began working the salt ponds. Born in Braga in 1772, he reached Cape Verde in 1792, was described as the richest man in the country and later served as colonial governor from 1834 to 1835. The tentative-list dossier records that he settled the site with families brought from Boa Vista and enslaved people from the West African coast.

The problem was never finding salt. It was getting it from a crater floor down to a boat. Pack animals did the work first. Then, in 1804, Martins had a tunnel driven through the crater wall to open a direct route to the pans, and a port was built at the shore in 1805. That tunnel is still the way in. Martins founded Santa Maria in 1830 as a second salt centre, and after his death in 1845 the business passed to his widow, Maria Josefa Martins.

The Brazilian trade and its collapse

Through most of the 19th century the salt went to Brazil, which took the bulk of an export trade running at up to 30,000 tonnes a year. In 1887 Brazil shut out imported salt to protect its own producers, and the Cape Verdean trade fell apart.

The ropeway years

In 1921 an aerial ropeway 1,100 m long was strung from the salinas over the crater rim to the loading quay, with a capacity of about 25 tonnes of salt an hour. The dossier describes it as diesel powered and the first of its kind in West Africa, and lists the plant that grew up around it: mechanical and carpentry workshops, a power station, and machines for sifting and grinding salt.

A company town grew around the pans, with a chapel, a school, a maternity unit and a canteen. Housing followed rank: sheds and prefabricated huts for salt workers, later replaced by basalt-walled houses with a door and one small window, and villas for engineers and managers.

Decline and protection

The late market for Pedra de Lume salt was Central and West Africa, and it went the way of the Brazilian one. The dossier points to the nationalisation of the salt trade in the Congo after independence in the 1960s as the blow that broke the industry; the island history records that exports from the crater stopped altogether by 1985. What is still produced goes mainly into cosmetics and thalassotherapy.

Protection came in stages: protected landscape by decree-law in 2003, national natural, historical and cultural heritage by a 2012 resolution, a site conservator appointed in 2014, and submission to the UNESCO tentative list on 15 March 2016 under mixed criteria. The submission is candid about the risks, naming tourist pressure, decaying machinery, the absence of a management plan, and gates that block the renewal of seawater and threaten the species living in the pans.

Visiting

Two secondary travel sources checked in 2026 give opening hours of 09:00 to 17:45 daily and an entrance fee of 6 euros per person, paid in cash at a booth just before the tunnel. Older write-ups and visitor reviews quote 5 euros, so treat the figure as approximate and bring a little more than you expect to need. Six euros is about 660 escudos at the fixed peg of 110.265 CVE to the euro. We could not find a first-party page for the site, so none of these prices should be treated as official.

Getting there

Pedra de Lume sits about 5 km east of Espargos on a branch road off the island’s main axis, and roughly 25 km from Santa Maria. Three ways of getting there are usual:

• On a half-day island tour. Minibus and pickup tours from Santa Maria string the crater together with the other standard stops, and the entrance fee is often quoted separately from the tour price rather than included.
• By taxi. A return taxi from Santa Maria with a wait of about two hours has been quoted at roughly 30 to 40 euros, and the driver should be booked to wait, because finding a cab at the crater for the trip back is unreliable.
• Aluguer plus taxi. A shared aluguer from Santa Maria to Espargos, then a short taxi hop east, is the cheap route; one 2026 account puts the two legs at about 120 escudos and 400 to 500 escudos respectively.

Driving yourself is straightforward, and there is a car park at the entrance mapped as free for customers.

Inside the crater

The sequence is short and does not vary. You buy a ticket, walk through the dark tunnel in the crater wall, and come out on the floor among the pans. The bathing pans set aside for visitors are shallow, so this is lying back rather than swimming. Mineral mud from the bottom is there to be scooped up and smeared on, which is what half the people around you will be doing.

Facilities are basic and clustered near the tunnel end: a visitor centre, a snack bar, a small spa offering salt and mud treatments, toilets mapped as free, and freshwater showers charged separately at about 1 euro or 100 escudos. The shower is not optional in practice. Brine dries into a thick crust on skin, hair and swimwear within minutes of leaving the water.

A signed circular path of about 3 km runs around the salt flats from the visitor centre, best walked anti-clockwise, with the clearest route and signage on the north-east side. Expect worn benches and some empty information boards. It passes marked viewpoints on the rim, and it is the only way to see the full sweep of colour from above.

Tips

Come early or late. Two 2026 write-ups both advise arriving before about 09:30 or in the late afternoon, because coach groups arrive through the middle of the day, which is also when the heat in a rock bowl with no shade is at its worst. Clear sun also brings out the colour of the pans, so a hazy morning of harmattan dust is a poor day for photographs.

What to bring

• Cash in small notes. Cards are reported not to be accepted at the booth, and you want separate change for the shower.
• A bottle of drinking water for your face. Brine in the eyes is genuinely painful, and having fresh water at the pan edge to rinse with is worth more than anything else you carry in.
• Water shoes or old sandals. The pan floors are crusted salt and grit.
• A towel you do not mind ruining, plus a change of clothes. Salt crystallises in fabric and does not brush out cleanly.

Things worth knowing before you get in

Do not shave on the morning of a visit, and think twice if you have fresh cuts, grazes or sunburn. Hypersaline water finds every one of them. Keep your head up and out; a splash to the eyes ends the float. Rings, watches, cameras and phones all do better in a dry bag than in salt spray.

Comparisons to the Dead Sea come up constantly here, and they are a comparison rather than a measurement: guides use them because floating feels similar, not because anyone publishes matching salinity figures for the two. Treat the multipliers you see quoted for how much saltier this water is than the sea with suspicion.

The crater is one stop, not a day. Most people are done in an hour or two including the float and the shower, which is why it is usually paired with the sea cave at Buracona or a beach on the way back. The rim walk is what adds time, and the village and its old pier below are a short detour for anyone curious about what a company town in Cape Verde looked like while the salt was still moving.