beech bluebells bulbs Coney's Castle Dorset England english exercise Fagus flowers footpath fresh Great Britain green natural nature path spring trail trees walk woodland ancient architecture Bonaguil castle defend dordogne flag France french high historical keep old power protection Remains secure security stone strength strong tall tower wall blue fort hill track wild 17th century Argolis battlements defence defense elements fortress Greece landmark Morea nafplio Palamidi Peloponnese ramparts stronghold venetian walls arch hilltop ruins 12th Century background building christian church dark Hopperstad mediaeval medieval norway norwegian religion religious stave tar tarred texture tiles Vik wooden