Yes, you can walk to many of the sites in Sintra, but it requires a significant amount of uphill hiking. From the Sintra train station, the National Palace and the Historic Centre are a relatively easy, flat 10–15 minute walk. However, reaching the "top" sites—Pena Palace and the Moorish Castle—is a different story. While there are beautiful pedestrian trails like the Vila Sassetti and Santa Maria trails, the climb is steep and takes about 45 to 60 minutes of strenuous walking through the forest. For 2026 tourists, a popular "compromise" is to take the 434 tourist bus or a tuk-tuk to the top of the mountain and then walk downhill back to the town center. This allows you to enjoy the lush vegetation and viewpoints without the exhausting climb, making the most of your time in this UNESCO-listed "Cultural Landscape."