17th century architecture Argolis castle city defence defense elements fort fortress Greece historical landmark Morea nafplio old Palamidi Peloponnese power ramparts sea stairs steps stone stronghold venetian view walls a challenge business fitness glass modern move to the top stair staircase stairrail stairway translucent upstairs upwards way to go Apulia blue chalk cliff coastal coastline defensive forest Gargano Italy rock Ruglia security shore tower water woodland ancient boulder Cornish cornwall door England english Great Britain Michael mount national trust saint St. Michael's Mount windows arch archway austere courtyard curved desolate doorway eerie empty entrance gate gray grey house manor Nymans ruined semi-circle Sussex wall winter classic Edinburgh fence georgian grass green new town railings scotland sky square stones town townhouse tree trees window harbour haven little low rocks safety small tide wave fit success training