Starting in the mid-1990s, Valencia, formerly an industrial centre, saw rapid development that expanded its cultural and tourism possibilities, and transformed it into a newly vibrant city. Many local landmarks were restored, including the ancient Towers of the medieval city ("Serrans" Towers and "Quart" Towers), and the Saint Miquel dels Reis monastery (Monasterio de San Miguel de los Reyes), which now holds a conservation library. Whole sections of the old city, for example the Carmen Quarter, have been extensively renovated. The "Passeig Marítim", a  long palm tree-lined promenade was constructed along the beaches of the north side of the port "(Platja de Les Arenes, Platja del Cabanyal and Platja de la Malva-rosa").