Here you are! Look around. In one of the corners of this square you may find a tiny house. In fact it is the narrowest tenement house in the Old Town in Warsaw. 

The question is if it is the narrowest house in Warsaw. How about taking a selfie in front of this narrow house? 

Task 4

Check on the internet the narrowest house in Poland and find information where it is located. Give the answer to the administrator of communications portal. 

If you are right, open the page "A secret passage".