Access rock balcony with a rope traverse will lead us to a small cave entrance. A draft from the cave hits us in the face and darkness surrounds us. Only the light of our headlamps will guide us on our underground journey. We will overcome the entrance abyss with a rope and reach the underground corridor. We will overcome several chasms and pools using a system of rope traverses. We will free climb to overcome the vast chimneys in the ceiling of the corridors and descend several chasms. By a labyrinth of corridors we will finally reach a massive fossil corridor, which ends with a rock window in the rock wall, from where we rappel 45m back out of the cave to the surface.