I want to travel to Segovia to see the Cathedral and the Alcazar on Sunday 4/9 but there are no online tickets available for the Cathedral in the afternoon. Are just the advance tickets sold out? Can I still walk up and buy one? Does anyone know what time the Cathedral closes on Sundays? Or, specifically, on holiday Sundays? Rick's Spain book says its open until 9:30 but I am unsure based on the website.