September 11, 2014. The National Day of Catalonia (La Diada Nacional de Catalunya) Barcelona, Catalunya, Spain. After the massive demonstrations of the Big “V” were over, Teo and I were walking home, when we spotted this subway vent on Passeig de Gràcia, not far from Gaudí’s Casa Milà, and all the jolly activities that ensue when you mix a bit of wind with a spirit of elated togetherness.