Old Street roundabout is a diamond-shaped circulatory system designed in the late 1960s to thin out the… — Ben Aaronovitch

Old Street roundabout is a diamond-shaped circulatory system designed in the late 1960s to thin out the number of cyclists heading in and out of the City. In line with the then-current planning conventions they added a series of mugger-friendly underpasses, an insufficiently wide entrance to Old Street Underground station, and a small shopping arcade lined with urine-attracting beige tile.…

You can say what you like about late-sixties architecture, but when they baked in the ugly they baked it in good.

p. 38Source: Wikiquote · CC BY-SA 4.0