Decorations during Spanish Christmas are basically the same as here in Canada (with the main decoration being a Christmas tree). A slight difference could be that there might be "Feliz Navidad" instead of "Merry Christmas".
50 Most Beautiful Christmas TreesIt’s that time of the year again! It’s about time to set up your Christmas tree. Yes, Christmas tree is probably one of the most apparent signs that you’re ready for Christmas. It’s time to hang those ornaments and tinsels