Google Street View
This amazing roundabout art which consists of collection of colourful Sphere, Cube, Cylinder, Pyramid, Prism and Cone is located on E Tyndell Street, Splott, Cardiff.
Created by French artist Pierre Vivant in 1992, it is made of discarded street signs and is the most famous landmark in the area. The roundabout is popularly known as Magic Roundabout.
Source of info: yelp.co.uk