The main local tourist office, Ask Me Sintra, has details on opening hours and prices, on walking trails in the countryside, and on tour companies. It also houses an art gallery (the Galeria do Museu Municipal) specializing in works associated with Sintra. There's another office in the train station.
AskMe Sintra. Praça da República 23, Sintra, Lisbon, 2710-616. 219/231157; www.cm-sintra.pt. Tues.–Fri. 9–noon and 2–6, weekends 2:30–7.