Urban planning meets geometric perfection 🏙️ Barcelona's Eixample district showcases Ildefons Cerdà's revolutionary 1859 grid plan—octagonal blocks with chamfered corners creating visibility, equal sunlight distribution, and efficient traffic flow. This perfectly planned neighborhood proves that geometric urban design can balance density with livability, turning city blocks into functional art that still serves millions 165 years later. #Barcelona #UrbanPlanning #CityDesign #SpainTravel | Eyebi