Most NDBs are located either on the airport or somewhere in a field. So when I got the QSL for NDB SO on 390 kHz I was a bit surprised. I checked Google Maps but indeed, there it was, right in the centre of the village Sigüiero, next to appartment buildings and the local soccer stadium. About 7 kilometers north of Santiago-Rosalía de Castro airport.

NDB SO-390 kHz for Santiago de Compostela, in the centre of Sigüiero village (GoogleMaps)

Compared to the other beacons from the north coast of Spain, B (Bilbao), COA, C (La Coruna) and SA (Santander), NDB SO is less often heard at my QTH. And this was the first time in reasonable quality, good enough for a report.

Santiago–Rosalía de Castro Airport was previously named Lavacolla Airport and is also known as Santiago de Compostela Airport. It is the biggest and busiest airport in Galicia and the 2nd busiest airport in northern Spain after Bilbao Airport. The fact that it is at the end of the pilgrimage route to Santiago de Compostela does help obviously and traffic is still growing significantly.
The airport has been named after the Galician romanticist writer and poet Rosalía de Castro on 12 March 2020

Thanks to Enaire for confirming my report!