Sintra is a town and municipality in the Greater Lisbon region of Portugal, located on the Portuguese Riviera. The population of the municipality in 2011 was 377,835, in an area of 319.23 square kilometres. Sintra is one of the most urbanized and densely populated municipalities of Portugal and hosts several cities albeit the seat of the municipality is the town of Sintra proper. A major tourist destination famed for its picturesqueness, the municipality has several historic palaces, castles, scenic beaches, parks and gardens.
The area includes the Sintra-Cascais Nature Park through which the Sintra Mountains run. The historic center of the Vila de Sintra is famous for its 19th-century Romanticist architecture, historic estates and villas, gardens, and royal palaces and castles, which resulted in the classification of the town as a UNESCO World Heritage Site. Sintra's landmarks include the medieval Castle of the Moors, the romanticist Pena National Palace and the Portuguese Renaissance Sintra National Palace.
Sintra is one of the wealthiest and most expensive municipalities in both Portugal and the Iberian Peninsula as a whole.