A demographic shift has left the Spanish countryside with hundreds of ghost villages, telling tales of people like Gustavo Iglesias.

Iglesias, like others in the hamlet of Acorrada in the northern Spanish region of Galicia, moved to a larger town for work, leaving behind a village with six gray-stone houses and two horreos, or grain stores, overlooking a lush valley. His family had lived there for generations, growing wheat and tending to cows, but by the time his father died about 30 years ago, it had emptied out, abandoned and left to crumble.

Now, the 57-year old-who works as a port policeman in Burela, a fishing town on the Galician coast-has joined with other owners to put the hamlet up for sale, trying to give it a new life. The asking price? Just 85 000 euros, or $96 000 (just under R1.4m at current rates).

"I'd like someone to buy it and do it up so that it continues to have a life," said Iglesias.

Spain's countryside is dotted with hamlets like Iglesias's that are being sold after their owners abandoned them. For the government of Prime Minister Pedro Sanchez, who made the reversal of rural depopulation a key policy issue when he came to power last year, such efforts can help stem rural desertification before it tips into crisis territory. Sanchez, who faces a general election in April, will on Friday discuss with his cabinet measures to reverse the trend.

"We need to be aware of the demographic winter that threatens a large part of our territory," he said at a forum on Tuesday. "Half of Spain's municipalities have fewer than 1 000 inhabitants, and a large part of our territory is at risk of depopulation."

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Adventurous foreigners and enterprising Spaniards are starting to be seen as part of the solution as they buy some of the hamlets, taking advantage of bargain prices. Aldeas Abandonadas, an estate agency specialising in such sales, last year sold about 40 villages, with foreign buyers accounting for 90% of the transactions. The company recently got a boost after Gwyneth Paltrow flagged one of its villages on her website as a good Christmas present.

"People are coming from all over the world to buy," said Pepe Rodil, a manager at the agency, who pointed to the area's famous food-octopus, scallops, and clams as well as heavy winter bean broths with chorizo and pork and chorizo in cider-as a draw for potential buyers of hamlets like Iglesias's.

Not enough babies

There are about 1 500 abandoned hamlets in Spain, said Elvira Fafian, the founder of Aldeas Abandonadas. An increasing number of them are being put on the block since local councils require owners to maintain their properties, which many can't afford to do. The ghost-village phenomenon is likely to grow, she said.

While urbanisation is emptying rural areas across large swathes of Europe, the trend is dramatic in Spain. About 53% of Spain has a population density of fewer than 12.5 inhabitants per square kilometre - among the worst rates in western Europe. Depopulation is rapidly becoming a campaign issue for the April elections, with the opposition Ciudadanos party last week proposing a tax cut for municipalities with fewer than 8 people per sq km. A new political party called Partido Ene has emerged, championing rural Spain and pushing for policies to combat depopulation. It plans to compete in the municipal elections slated for May.

Spain's fertility rate of 1.3% in 2017 was the second-lowest in the European Union, after Malta, and the gap in the country between urban and rural births is one of the widest in the EU. A lack of young people means the population isn't replenished, while the regions also lose the entrepreneurs who might have generated employment and driven the local economy.

A recent European Commission report highlights depopulation in rural areas and the pressure on Spain's cities among issues of concern. Madrid, Barcelona and the string of smaller cities along Spain's sun-soaked Mediterranean coast don't yet face the challenges of pollution, traffic congestion and strain on infrastructure seen in mega-cities, but they're sure to surface in the future.

"Lots of experts say that 70% of the population is going to live in mega-cities by 2050," Isaura Leal, commissioner for the government on rural depopulation who stepped down ahead of elections, said in an interview in Madrid. "We believe we have the capacity to reverse that process. There is still time."

Public and private

Tiny steps are already underway. Increasing the reach of broadband internet that allows people to work from home is one measure being studied. Providing incentives for people to move into rural areas is another. In Asturias and Galicia, the local government partly funds the restoration of roofs on traditional houses.

The private sector effort may come from people like Alberto Hidalgo, an advertising and fashion photographer from Madrid who bought a 35-hectare hamlet in northern Spain for 120 000 euros through Aldeas Abandonadas.

On a balmy day in February, he was meeting a pair of local architects to discuss how to convert the place into a spa retreat. Hidalgo and his make-up-artist girlfriend had effectively bought their own valley, whose steep banks are covered with oak, chestnut and eucalyptus trees. The main house sits on the knoll surrounded by stone buildings that they plan to convert into accommodation. Below, an apple orchard tumbles down toward a brook and in the distance, the murmur of a small waterfall complements the lowing of grazing cows.

"We were looking for somewhere where we couldn't see anyone," Hidalgo said.

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He has kept in touch with the previous owners, a family whose members had lived there for 118 years. The family's been back to visit after moving to a nearby town and leaving behind almost all their furniture and crockery. Dozens of tools, as well as an old cider press and grape mill, are stacked up in a barn.

Whether it's a desire to preserve Spain's cultural history or because technology now makes it possible to work from anywhere, people are starting to trickle back. Persuading people to move back in significant numbers, though, may be too ambitious, said Luis Antonio Saez, a professor in applied economics at the University of Zaragoza. The best that Spain can hope for is to stem the bleeding.

"Bit by bit, what we'll see is a certain restructuring, rather than a repopulation," Saez said.

For his part, Iglesias, who for decades resisted selling his childhood home for sentimental reasons, said he's ready to do his bit.

"I prefer to sell it, so it can have a life again and people can enjoy it," he said.