roman bridge of catribana, ancient bridge in limestone under a river - saint john of lampas, sintra portugal

ancient arch arched architecture bolelas bridge catribana construction culture das discover era europe european exploration exploring hiking historic history john joapound lampas landmark landscape limestone medieval montelavar monument natural nature old outdoor path portugal portuguese reflection river riverside rock roman romansnsintra ruins saint samarra scenic sightseeing sintra stone terrugem times tourism travel travelling trekking used vegetation viewpoint wall