Reminds me of a story, but I don't know if this actually happened:

An architect was asked to plan a new university campus. He presented his plans with all the different buildings, but people were astonished: "You have not planned any paths in your layout!". Architect: "We'll just sow grass everywhere. A year later, we will know where to put the paths."

It’s interesting how the ground on the downhill side of the wall seems to have built up to meet the top side. I don’t know if it’s just from storm water washing the exposed dirt down or coming off people’s shoes, maybe both, but it makes me think this has existed for a long time!

Is this Leuven? The Delhaize + apartment buildings in the background ring a bell.