Sintra is one of the most popular day-trip destinations in Portugal, and as a result, it is almost perpetually crowded, particularly between the months of April and October. Because it is only a short 40-minute train ride from Lisbon, thousands of tourists descend on the small town daily to visit the Pena Palace, Quinta da Regaleira, and the Moorish Castle. During peak hours (10:00 AM to 4:00 PM), the narrow, winding streets can become heavily congested with tuk-tuks, tour buses, and pedestrians, making navigation a challenge. The Pena Palace, in particular, often sees long queues for entry even with its timed-entry system, and the "Instagrammable" spots like the Initiation Well at Regaleira can involve significant wait times just for a photo. To avoid the worst of the crowds, it is essential to arrive as early as possible—ideally on the first train from Rossio Station—or visit during the "shoulder season" in late autumn or winter. Many seasoned travelers recommend staying overnight in Sintra to experience the town’s misty, magical atmosphere in the late evening or early morning after the day-trippers have departed, which offers a much more serene and authentic experience.