https://www.seat61.com/train-travel-in-spain.htm , https://www.seat61.com/Spain.htm
https://www.seat61.com/european-train-travel.htm
https://www.ricksteves.com/travel-tips/transportation/trains/spain-rail-passes
https://www.lonelyplanet.com/articles/train-travel-spain
https://www.thetrainline.com/trains/spain/map
https://www.omio.com/trains/spain
https://thedigitallabyrinth.blogspot.com/search?q=the+train+in+Spain
