bogdo mountain. astrakhan, russia, natural

171 1496 above akhtuba also and are astrakhan away baskunchak beams big bogdinskobaskunchakskaya bogdo caspian caves desert developed district earth etc forms grottoes has highest karst lake landscape largest level located lowland more mountain mud natural nature point region relief reserve reserve2 russia salt sea sinkholes steppe surface territory than there these today tourism travel treatment underground valley view