Cats love climbing, and they certainly need no human help to navigate precarious-looking structures. But in the Swiss city of Bern, cat owners are extra concerned of the wellbeing of their pets. All around the city you will see structures built specially for cats to climb. They look like fire exits, but of a more dangerous kind, attached to the outer walls, creating a path from the upper floor balconies or windows down to the street.

Switzerland-b*ased graphic designer and writer Brigitte Schuster chronicles this unique phenomenon in her new book Swiss Cat Ladders.