If you ever visit Spain during the Christmas season, you will be mesmerized by its transformation. At the start of the holiday season, all the streets and shops are decorated with colored lights and Christmas trees, and the towns are bustling and cheerful.
From 12/15/2019 to the end of the year, I have traveled in Spain among the below cities:
Barcelona (12/15 - 12/22)
Málaga (12/24)
Seville (12/25 - 12/28)
Cordoba (12/29-12/30)
Madrid (12/31)
Spain Travel―Visiting Christmas Shows and Lights (2019; YouTube link)
2019 Christmas Eve in Málaga, Spain (YouTube link)