Sintra is a town in Greater Lisbon, Estremadura, Portugal. Its spectacular setting, 28 km from Lisbon, houses a Royal Palace, used by generations of Portuguese royalty prior to the 1910 revolution. The surrounding hills are surmounted by the remains of the Moorish Castle and by the 19th century Pena Palace.
Near Estoril, the majestic Sintra Mountains cast a veil of mystery over the town nestling on its northern slopes. The hills and the surrounding area have been classified as UNESCO World Heritage Site for their cultural significance and for their outstanding natural beauty.
The name Sintra is derived from the same root as the English word "sun". It is located in a mountain range some 28 km (17 mi) north-west of Lisbon, and approximately 9 km (5.6 mi) from the Atlantic coast in the west. There is evidence of human activity in the area at least since the Paleolithic stone age.