The flora and fauna of the Blue Mountains is de facto unique, precious and found in no other place in the world. landscape of sandstone and basalt, formed by volcanic eruption, wind and water erosion. On a day of November , we reached the blackhole of Calcutta, a 50m vertical drop led us to the abyss of Claustral Canyon. Two enormous walls appears in front of us, the light has difficulty penetrating the narrow part of this unique landscapE. a DANGEROUS AND Deadly terraiN Worth photographying.