I always have been fascinated by construction sites, where the making of architecture happens, when you can see the reality of materials getting shaped by very hard-working people. Along my wanderings, I filmed / took picture of a few constructions of sidewalks. To see how things are made is interesting and I personally enjoyed the show. I hope you will too!
First, when you need to cover up a giant hole over pipes and other urban guts:
Then, when you actually make a concrete sidewalk:
When it is in an old French town like Rouen, you make it with cobblestone: