Ka kammala wannan furcin: Western Heights na Dover yana ɗaya daga cikin birane masu ƙarfi da aka gina a Britaniya. Sun ƙunshi jerin sansanoni, maki masu ƙarfi da ramuka, waɗanda aka tsara don kare United Kingdom daga mamayewa. An halicce su ne don haɓaka kariya ta yanzu da kuma kare babban tashar jiragen ruwa na Dover daga hare-haren teku da na ƙasa. Na farko da aka ba da aikin ƙasa a 1779 a kan
An shirya mamayewa a wannan shekarar, an yi amfani da tudun da ke yammacin Dover, Ingila, yanzu ana kiransa Dover Western Heights, a cikin 1804 lokacin da aka umurci Lieutenant-Colonel William Twiss don sabunta tsaro na yanzu. Wannan wani ɓangare ne na babban shirin ƙarfafawa don mayar da martani ga shirin Napoleon na mamaye Ingila. Don taimakawa tare da motsi na sojoji tsakanin Dover Castle da garuruwan kare gari Twiss ya yi shari'arsa don gina Grand Shaft a cikin dutsen: