Treasure hunt around the city

One day in the afternoon with qr codes and some clues that we made ​​previous in groups in Catalonia, we began a treasure hunt throughout the city of Amsterdam.
This was to find all the hidden codes around the city with clues and when we find  the code take a picture in it.
This activity from my point of view was one of the best of the whole trip, because we all discover the most emblematic of the city and know it and placed us on without the help of teachers, only for our mobile and a  map.
We were able to visit places like the red light district, the Waag, the Begijnhof, the Cathedral, Damm Square, some museums and some important statues.
All of this we did with bikes, traveling as most city dwellers.
It was an event to remember!