Aerial drone view of Belem Tower, UNESCO World Heritage Site, a 16th century fortification on the Tagus River, Belem, Lisbon, Portugal, Europe

photography panoramic color image travel destinations travel horizontal outdoors day incidental people portugal europe 16th century belem tower tower architecture unesco world heritage site fortification tagus river river water belem lisbon coastline water's edge sea drone point of view aerial view copy space clear sky travel destination tourist destination tourist destinations towers seas ocean oceans rivers flowing water outdoor outside daytime