hot spring sea water and small swamps near lac assal salt lake , 150m below sea level - djibouti, east africa

afar africa ali ardoukoba arta assal below crater dead diving djibouti exploration extreme frozen geologists geothermal green greenery gulf highlands holiday horn hot islam lac lake land landscape level loneliness minerals mountain mousa muslim national nature nobody outdoor red resort rock salt sea snorkeling somalia springs summer swamps tadjoura tranquil travel treasure volcano volcanologists water wilderness