Sintra is like the one-stop shop for castle lovers, with not one, not two, but three gorgeous castles. This medieval stronghold town is so beautiful it was called Glorious Eden by the British poet Lord Byron. The town's focal point, Sintra National Palace, is distinctive for its whimsical interiors: columns twisted like barley, an Arab-style courtyard situated around pretty fountains, and glazed tile work known as azulejos. Beyond the town's fortress walls—but still within walking