Treasure hunt: the Sultan's Diamond

Joni and Basil's mother found this mysterious note at Train World:
"Something is hidden in this museum. It's in a box and the code is lost. Let the diamond dazzle you and luck shall be yours."
What a discovery! Want to find out more? Come to Train World and join Joni and Basil on their treasure hunt.
Reservation/info via trainworld.be
Plan available at the museum.

⭐ Family hunt
📍 Train World Museum - Place Princess Elisabeth 5 at Schaerbeek