Enclosing Cardiff Bay is a barrage which you can walk across. The engineering end is actually near Penarth. I don’t know whose idea this was but it’s a great one. As you walk through the engineering stretch, you notice stretches of yellow paint seemingly at random. It’s only when you look back that you realise the splashes create the impression of concentric yellow circles. Excellent.
I love the Cardiff bay one as I work down there so get to see it everyday.
Check out my top 10 that I did with this very one in it>> http://theverybesttop10.com/2013/05/07/examples-of-anamorphic-illusions/
Thankyou and how amazing is your top 10? Incredible.