Circles 1

As I was looking for straight lines today I found circles and couldn't resist taking a photo. There's a coffee shop in Prague 7, near Nadrazi Holezovice, called Cross, and outside this coffee shop (and it appears to be other things as well) are some objects. This is part of one of them. I walk past them once or twice a week and each time I wonder. But wondering is part of what life's about, isn't it? So I thought you could wonder too ...