St. Mary in Castro and Roman Pharos, an ancient lighthouse, at Dover Castle, Dover, United Kingdom

King Edward Point research station with fisheries patrol boat Pharos alongside at the jetty, South Georgia, Polar Regions

View of St. Mary's Church and Roman Pharos, Dover Castle, Dover, Kent, England, United Kingdom, Europe

Roman Pharos, an ancient lighthouse, at Dover Castle, Dover, Kent, England, United Kingdom, Europe

St. Mary in Castro church and Roman Pharos, an ancient lighthouse, at Dover Castle, Dover, Kent, England, United Kingdom, Europe

Buildings used as store rooms at the Citadel of Qaitbay, also known as Fort of Qaitbay, Alexandria, Egypt

Egypt, Alexandria, Citadel of Qaitbay, also known as Fort of Qaitbay.

England, East Sussex, Beachy Head, Lighthouse seen from the cliff top.

England, East Sussex, Beachy Head, Lighthouse seen from the cliff top.

England, East Sussex, Beachy Head, Lighthouse seen from the cliff top.