Martina, this is a great series of photos. There are many good shots here including the murals, the two Black Birds, and of course the industrial stairway that comes first, but the one that really struck me was your photo of the concrete wall behind the fence just above your reflection shot of the loading crane. It has wonderful rectangles and looks to be made of giant Lego blocks.
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Thank you!
Hints: harbor. coal.
https://goo.gl/maps/9n11UuXmPzmNJqJj6
I put the google maps marker in front of the now deprecated gate in the photo before the one you are talking about.