Belgian Expansion for Ticket to Ride / Zug um Zug
A high quality, fan-made expansion is available for Ticket to Ride/Zug um Zug: The Belgian Expansion aka Les Aventuriers du Rail en Belgique. The expansion is created by Nicolas Maréchal. It comes with a lot of materials and a how-to guide.
Please note: Naturelich is just pointing out that this fan-made expansion exists. I am neither promoting nor endorsing the practice of fan-made expansions. I have not created a fan-made expansion or a copy of it.