"Sintra" refers to a town filled with multiple distinct monuments, each with its own closing time in 2026. The most famous site, the Pena Palace, typically closes its interior at 6:30 PM, with the surrounding park closing at 7:00 PM (the last entry is usually one hour before closing). The Quinta da Regaleira and the Castle of the Moors generally follow a similar schedule, closing around 6:30 PM during the summer months and slightly earlier (around 5:30 PM) during the winter season. The National Palace of Sintra, located in the town center, also closes at 6:30 PM. It is vital to note that Sintra is extremely popular and utilizes a timed entry system for the Pena Palace; if you have a late afternoon slot, you must be punctual as the "closing time" refers to when the gates are locked, not when the last tour starts. Most monuments are open daily, except for December 25th and January 1st.