Calade
From Wikipedia, the free encyclopedia
Calade is a French term for a harmonious, decorative and useful arrangement of medium-sized pebbles, fixed to the ground.[1]

Rue en calade describes a road with a surface composed in this way—essentially a cobblestone road. These are found predominantly in the French region of Provence, and generally in the Mediterranean area.
The corresponding term in Italian is risseu, a term borrowed from Ligurian.