Major shopping malls in Bangkok are beautifully decorated and offer free admission. Recommended spots include:
Central Embassy: Often features a Christmas light tunnel.
ICONSIAM: Hosts a riverside Christmas market.
Siam Paragon and centralwOrld: Both feature large Christmas trees and decorated plazas; since they are located close to each other, you can visit both in a single outing.
EmQuartier: Offers themed decorations and is located right by the Phrom Phong BTS station.
Chocolate Ville: An outdoor dining complex designed like a European village—it looks its best once the lights come on. As it is located far from the city center, it is best reached by taxi or Grab.
Additionally, there is the "Vijit Chao Phraya" light festival along the Chao Phraya River. It is best visited in the evening, after 6:00 PM.