The Magic Fountain was designed by Carles Buïgas in 1928 for the 1929 Universal Exposition. The fountain uses 3620 jets and over 700 gallons of water to create an impressive visual show. The display times vary based on the time of year. If you're in Barcelona between March and early January be sure to check out the display.
You can check the days and times here.
It took just 1 year to complete Buïgas' ambitious project. Over 3000 workers were used to get the fountain ready in time for the Universal Exposition. The first show debuted just one day before the start of the Expo. In the 1980's, music was added to the show to enhance the performance.