Fodor's Expert Review Castelo dos Mouros
The battlemented ruins of this 9th-century castle still give a fine impression of the fortress that finally fell to Christian forces led by Dom Afonso Henriques in 1147. It's visible from various points in Sintra itself, but for a closer look follow the steps that lead up to the ruins from the back of the town center (40 minutes going up, 25 minutes coming down). Alternately, you can catch the SCOTTurb's Bus 434 or rent a horse-drawn carriage or tuk tuk in town. Panoramic views from the serrated walls explain why the Moors chose the site.