Treasure Hunt: Indiana Jones and the lost treasure of Cover

Rumours say, that somewhere in Groningen Cover's lost treasure is still hidden. Many have searched for it, but none have found it.

With your team you are going to solve assignments and riddles/puzzles to progress towards the treasure! Both the assignments and finding the treasure first earn you points. We start at the Cache. At several locations there will be assignments to be fulfilled.

Can you find the treasure?