View of the National Palace with its conical towers, Sintra, near Lisbon, Portugal, Europe

photography colour colour image color color image horizontal horizontal image outdoors outside day nobody no one no one travel travel destination travel destinations tourist destination landmark landmarks famous well known well known national palace conical tower sintra lisbon portugal portuguese europe european building exterior building buildings architecture architectural urban scene urban scenes urban medieval tree palace of sintra town palace history historical historic heritage royal residence unesco unesco world heritage site world heritage site