Yes, someone suggested me to visit Maastricht or Valkenburg during Christmas time if I really want to see Christmas markets in NL but because it's far from my city, I am not sure if I can manage time to go there this year. I was checking the time schedule and seems like it's nice to be there before the new year. I guess it's called Maastricht Vrijthof, not so sure though. I will try to manage my time...

Thank you so much, I also love the first picture a lot, it showcases the beauty of Leiden...