Photos of Cardiff

So I’ve got a few photos that I put together from Cardiff City Center. I’m not sure if the castle is technically in the city center or not but I including those few anyways. There are captions on a few of the photos.

So I’ve got a few photos that I put together from Cardiff City Center. I’m not sure if the castle is technically in the city center or not but I including those few anyways. There are captions on a few of the photos.
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Photos!
What do those zigzag patterns indicate in the city street? I especially like photos #6 and #10, the ones that show the interesting juxtaposition of the buildings.
Not a clue. I’ll look at my other street photos to see if I see a pattern.
(Now it’s bugging me!)