Martinitoren treasure hunt
Martinitoren tower-keeper for one day
You will for sure feel it in your muscles when you are done climbing the almost 300 steps up the Martinitoren. But rest assured: there are options for breaks along the way to have a look at its ancient interior. What would those bells weigh? And why do Groningen residents refer to the tower as the Old Grey One? Climb up there like a real tower-keeper to find the answers.