gutmanala yellow sandstone cave with inscriptions, biggest grotto in baltics, gauja national park, sigulda, latvia

ancient baltic brown cave cavern cliff colored destination devonian feature formation gauja geological geology grayish grota grotto gutmana gutmanala gutmanis gutmans inscriptions landscape latvia monument national natural nature old orange outcrop park place popular primeval red reddish rock sandstone sight sigulda stone texture tourism tourist travel velnala view wall yellow