The Lyon-based artist Em Emem (a pseudonym, of course) uses mosaics to fill in gaps in street infrastructure, but also to make them gorgeous. “‘I’m just a sidewalk poet, a son of bitumen,’ he says. His work involves filling potholes and cracked walls on city streets with beautiful mosaic designs, a process he calls ‘flacking’ – a play on the French word flaque, meaning puddle or patch.”- The Guardian (UK)