bedrock beige brown cliff defensive face fortifications garden Malta path plant rock sandstone stone travel UNESCO World Heritage Valetta yellow ancient aubretia battlements castle defence defense historical history Italy Monte Sant'angelo old protect Puglia secure tower turret wall blue crenellations dundee home house Mains scotland scottish sky strong sunshine walls windows architecture building city defend fortification Israel Jerusalem landmark limestone security strength England english Great Britain Sussex curved cyprus fort Girne harbour Kyrenia port stronghold attraction exercise Girona high long narrow pathway Spain spanish thin tourist town view walk artillery barrel black blast cannon carriage fire gun gunpowder iron metal tree wheel