Tout au long de la route.

Les services de la mairie ont planté des bouleaux tout au long de la route // 
The town hall department planted birches along the road

When I was a kid all these years ago, I had an impression that birches, especially silver birches, were somehow exclusive to Russia. I am not saying that the idea was being actively planted, I don't think anybody was bothered to do it. But what with it being the symbol of Russia and practically nobody ever allowed outside of the Soviet Union, well, you can see how it might have developed.

It wasn't only me who was under this impression. Later on when the regulations became slacker and the brain-drain began, suddenly we got exposed to what the "outside" was really like. I remember my university friend sharing with us a little observation his relative brought back from his visit to Canada: "You know, every fifth tree is not a silver birch".

So. I don't know where the cat is playing hide-and-seek (cache-cache). Could be anywhere.