Ol Doinyo Lengai volcano is situated in one of the beautiful places of North Tanzania, near Lake Natron where hundreds of thousands of pink flamingos fly every year. Ol Doinyo Lengai is unique among active volcanoes in the East Africa and unique in the world which produces natrocarbonatite lava or “cold lava”. It has a dark-brown or black color in liquid state and a fluidity as water. This temperature is much lower than other lavas but, however, not so cool because it is approximately 510-600°C. In a hundred years Lengai has erupted about 15 times, the last time was in 2013. Fortunately, eruptions happen without victims because the volcano has relatively small size and it is situated rather far from nearest Maasai villages.