I want to know the answer to the following question:
What part of Valencia is undergoing improvements?
All the background I'm provided with is that "Valencia has experienced a surge in its cultural development during the last thirty years, exemplified by exhibitions and performances at such iconic institutions as the Palau de la Música, the Palacio de Congresos, the Metro, the City of Arts and Sciences (Ciutat de les". Is that enough to answer the question?