Staircases outside of apartment buildings always remind me of the US. In fact, I have not seen them anywhere else. I love them, as well as the many old buildings that I see in San Francisco. Our rented unit in San Francisco is in an street where there are many old buildings. This is a building across the road.
The origami crane reminds me of my Mom. When I was little (maybe about 5 years old), she taught me how to turn a flat piece of paper into a lovely 3 dimensional bird.