Listed as a UNESCO World Heritage site since 1995, this town is full of lively fairy-tale manors and palaces. Definitely worth visiting for its magnificent 19th-century Romantic architecture. In addition, Sintra is home to a number of picturesque parks, which serve as a great getaway.
Makes for a great day trip from Lisbon.
Wikipedia https://en.wikipedia.org/wiki/Sintra
UNESCO website http://whc.unesco.org/en/list/723
Address 6 Volta do Duche, Sintra 2710, Portugal
Coordinates 38°47'54.47" N -9°23'16.991" E