The Rambla de Mar is a splendid walkway and bridge over the harbour waters, running from Portal de la Pau to the Spain Dock, or Moll d’Espanya. This “Rambla of the Sea”, which also forms a natural continuation of the Rambla de Barcelona urban promenade, is now perhaps the best-known symbol of the Port Vell. The undulating shape and integration into the landscape of this singular promenade, used by nearly 75% of all visitors to the Port Vell, is a popular attraction amongst locals and visitors alike, and is also regularly used for shooting films and advertising. The Rambla de Mar swing bridge opens once every hour, on the hour, to let boats through, and also, by request, for longer periods. To see these sophisticated mechanisms in operation as pleasure craft sail in and out of the harbour is a spectacle well worth seeing.