What is the most exciting thing to do when walking around the city? For me, it is searching those details that make cities amazing. And from time to time it happens to be "simple" doors. Doors are our last barrier from the outer world, so we trust them well. I remember back in time we didn't even lock them, nowadays we are adding new locks and changing ordinary doors for more sturdy ones. What are we afraid of? From what are we closing our doors? Is the world different or are we locked outside from ourselves?
