sintra pena national palace, forest and yellow arched gallery

19th above abstract arched architecture background balcony beautiful blue building business centuries century citadel day europe expanse family fantastic farms floor forest fortified fortress fun gallery gorgeous green heritage hill holidays houses industries landscape major medieval mediterranean monarchy national over palace pena place portugal portuguese rebuilt residence rock romantic rural scene scenery seasonal sintra site sky stands summer sunny terrace top town tree unesco upper used valley vertical view walls window world years yellow