I’m not sure this one is practical (think of the cleaning) but it is a beautiful piece of work. As best I can gather from the automatic translation, it is actually based on the street design of city street map?
From Russian: Use A topographic map as A basin where the Water Flows through the ducts resembling the River channels. A Wooden Three-dimension basin Representing the Streets of central Part of London. London map Choice Being A tribute to the Fact That IT was England where first Industrial products HAD Appeared back in the XVIII century. Expected to use maps of Other Outlines That are Suitable for the overall composition.