la Rambla

The course of La Rambla was originally a sewage-filled stream-bed, usually dry but an important drain for the heavy rainwater flowing from the Collserola hills during spring and autumn. It separated the walled city on its north-east bank from the settlements of El Raval ("the suburb") on its south-west.
In the year 1377, construction started on an extension of the city walls to include La Rambla and El Raval. In 1440, the stream was diverted to run outside the new walls, and La Rambla gradually started turning into a street... http://en.wikipedia.org/wiki/La_Rambla,_Barcelona

See on map

around