Antoni Gaudí’s work was deeply inspired by the natural forms of the Mediterranean and its wildlife. Here, his famous pavement tiles (1904-06) along Passeig de Gràcia decorated with octopuses, anominites, seaweed and brittle stars laid out sinuously on a sandy floor. The hexagons are perhaps based on honeycomb or more appropriately given the marine theme on a turtle shell.. Image from Museu de Catalunya.