An international scientific expedition "Towards the Centre of the Earth", led by Lithuanian Aidas Gudaitis (Aenigma), descended the main branch as far as , placing water level loggers at siphons here and in the "Chamber of Soviet Speleologists" at .
An international scientific expedition "Towards the Centre of the Earth", led by Lithuanian Aidas Gudaitis (Aenigma), descended the main branch as far as , placing water level loggers at siphons here and in the "Chamber of Soviet Speleologists" at .