the brough of birsay, orkney, scotland a 6th - 8th century pictish and norse settlement on a tidal island

sony dsc grass plain grassland hill coast field terrain prairie horizon pasture sea landscape wetland meadow shore marsh cliff plateau brough birsay orkney scotland 6th 8th century pictish norse settlement tidal island uka 7th ancient archaeological archaeology archeology architecture beach building causeway celtic christian coastal coastline fortress heritage historic history islands isles landmark mainland missionaries monument neolithic ocean old rocks ruin saint magnus sound stones viking village wall