What does the legend say will happen to someone who drinks from "La Font de Canaletes" in Barcelona?

The famous "Font de Canaletes" is a drinking fountain located at the top of La Rambla and is the reason why this section of the avenue is called "La Rambla de Canaletes". It's a relatively run of the mill wrought iron drinking fountain of which there are many in Barcelona. However, Canaletes is surrounded in legend and it is said that if you drink its water you will always return to Barcelona.

The place became known as the "Font de Canaletes" - the Catalan translation to "the fountain of the troughs or gutters" - presumably because of the ostentatiousness of the pipes and tubes that channeled the water. It soon became a popular meeting place as the water from the fountain was considered the best in the city. The Font de Canaletes is iconic to the people of Barcelona and the fans of their Futbol Club Barcelona -or Barca- and therefore, they gather to celebrate their victories there.

La Rambla is a street in central Barcelona. A tree-lined pedestrian street, it stretches for 1.2 kilometers (0.75 mi) connecting Plaça de Catalunya in the center with the Christopher Columbus Monument at Port Vell. La Rambla forms the boundary between the quarters of Barri Gòtic, to the east, and El Raval, to the west.

The Spanish poet Federico García Lorca once said that La Rambla was "the only street in the world which I wish would never end."