This amazing festival and fiesta is a cacophony of light and sound for a week as Barcelona celebrates its Patron saint. A run of fire, dragons, giants, fireworks and the study of Cava are accompanied by numerous free music festivals.
There is more information at www.barcelonaflats.co.uk/whats-on-guide-la-merce-festival.htm
I am going back to La Merce again this year.