The Eixample , (Catalan for ‘extension’) is a district of Barcelona between the old city (Ciutat Vella) and what were once surrounding small towns (Sants, Gràcia, Sant Andreu etc.), constructed in the 19th and early 20th centuries.
It is known for the urban planning that divided the district into octagonal blocks. Influenced by a range of schools of architecture, Eixample was designed in a grid pattern with long streets, wide avenues, and rounded street corners. Despite being in the center of a thriving European metropolis, the district provides improved living conditions for inhabitants including extensive sun light, improved ventilation, and more open green space for public use. The vista of the grid-like structure is amazing from above: