Anyone travelling through Spain is likely struck by how sparse it is between the major cities. Here's two links to the "Lapland of Spain".
A BBC podcast "Empty Spain and the Caravans of Love"
https://www.bbc.co.uk/programmes/w3cswf69
The Caravans of Women - or Caravans of Love as they are known - began as a response to Spain’s epic story of rural depopulation. More than half the country is at risk, and in nearly 600 municipalities there isn’t one resident under the age of 10. And as Linda Pressly finds out, there are many initiatives now to reverse the decline of the Spanish countryside, including a movement of young people – the "neo-rurales" – who have begun to occupy abandoned villages.
also a recent NY Times article
https://www.seattletimes.com/nation-world/vanishing-spanish-village-pins-hopes-on-in-its-roman-past/
or (same story)
https://www.nytimes.com/2018/04/23/world/europe/driebes-vanishing-spanish-village.html
Overall, Spain’s national statistics show that more than half the country’s municipalities are at risk of ceasing to exist, because they have already fallen below the threshold of 1,000 inhabitants.