Ildefons Cerdà

And then around it spreads the Echamble, the 19th century grid.

So those are more of a city block looking vibe with wide avenues and cut off corners designed by urban planner Ildefons Cerda when the city tore down its walls.

And, of course, rising out of that grid is the work of Antoni Gaudi, Spain's most famous architect, if I dare say so, the architect whose buildings look like they grew out of the ground rather than got built.

Seven of his works are on the UNESCO World Heritage List.