Castles are one of my favorites themes on postcards. This one sent by Sofia shows some beautiful portuguese castles. I've been to all of them except two.
Clock wise: Guimarães; Porto de Mós; Montemor-o-Velho; Almourol; Ourém; Marvão; Óbidos; Penela; Pombal; Linhares da Beira; Roman Temple in Évora (not a castle, why is it on the card??); Castelo Rodrigo; Leiria; Celorico da Beira and Santa Maria da Feira.