I have completed Tier 2 on all 3 challenges to reveal the mystery bonus tile but I have yet to see one. Does anyone know where they are on all 3 routes?
Have you activated them - i couldn't find them either until I realised you had to activate the layer on the route. In the main menu of the route (incase you have auto journey mode on) click on square to configure overlays - then activate clicking X a marker icon appears. When you play the route the market will appear. Its the same market in all 3 scenarios. There are other articles in the forum if you search that say exactly where they are.