The BIG roundabout, very slightly odd as there is a railway level crossing running through the middle of it, how strange! But somehow it works, mind you we have 2-3 trains a day in winter so it's not a big thing. Still if you happen to be there at the right time it's worth watching SH1 grinds to a halt to wait for a train to come through.
Very large muggle area, in fact just go for it, so many people from all directions, cars, trains, pedestrians, bikes.. Maybe the invisibility cloak..
Now to the cache, well it's not in the central island (don't want anyone getting hurt), and of course not near the tracks nor in the roadway. But of course it's a round-a-bout the Roundabout, in more ways than one. Please realign the marks on the cache container so that the lid will stay on. No more clues for now that would spoil the fun.
When placed the cache had some trinkets, a small tb, pencil and a log sheet.