Until the Riera was diverted from its natural course within the city, this torrent—Puigpunyentí in origin—was the natural path for part of the waters of the Tramuntana River to the sea. This was due to the flood of October 1403, in which some 5,000 people died. La Rambla, Riera Street, Unió, and the Born form the fossilized imprint of this event. Back then, in the 15th century, the sea entered well inland, and up to the Plaza de la Reina, this urban promenade was a small bay, accessible by boat. The drying up of the Riera marked the birth of a new path, a public thoroughfare that constantly speaks to us, with its heart in its hand, of history and heritage, of natural disasters and festive celebrations, of life and death. The Born and the Muelle de la Riba dock are our urban walk to understand the city's relationship with the sea, of the memory of paths.