Fodor's Expert Review Quinta da Regaleira
A five-minute walk along the main road past the tourist office takes you to one of Sintra's most intriguing privately owned mansions. Quinta da Regaleira was built in the early 20th century for a Brazilian mining magnate with a keen interest in freemasonry and the Knights Templar (who made their 11th-century headquarters on this site). The estate includes gardens where almost everything—statues, water features, grottoes, lookout towers—is linked to one or the other of his pet subjects. Spookiest of all is the 100-foot-deep Poço do Iniciático (Initiation Well)—an inverted underground "tower."