Coat of Arms, Sintra, Portugal. Sintra is a resort town in the foothills of Portugal’s Sintra Mountains, near the capital, Lisbon. A longtime royal sanctuary, its forested terrain is studded with pastel-colored villas and palaces. The Moorish- and Manueline-style Sintra National Palace is distinguished by dramatic twin chimneys and elaborate tilework. The hilltop 19th-century Pena National Palace is known for a whimsical design and sweeping views.