This lava cave is located about 100 meters as the crow flies from the two Grotte dell'Angelo, on the path that leads from Monte Egitto to the Monte Scavo refuge, going up on the right, on the edge of the 1832 lava flow coming from Mt. Nunziata. The hypogeum was evidently at risk of being submerged by this flow and for a good part it extends right under this eruptive field. It is a cavity generated by the lava of 1651, which is accessed by a large collapse of the vault in its final part. The lighting and humidity here have favored the growth of thick vegetation, in particular enormous ferns and a large dog rose plant. The landscape is reminiscent of a subtropical environment, hence the name given to it, Grotta Amazzonia. In reality, from this large, well-lit opening, the canal proceeds both downstream, with a very low and difficult to navigate canal, where there is a second, narrower and more cramped entrance, but which does not require any tools, except attention to the instability of the rocks on the ground, while upstream the most interesting part opens up. At first the canal is about a meter high, then it rises and becomes walkable. And it rises more and more until it reaches a large, very large and spectacular room, 7 meters wide and 4 meters high. We are about 170 meters from the entrance. From this point, the cave begins to lower again until it becomes blocked. The cavity has several speleothems inside and is inhabited by several chiroptera (bats). Considering how easy it is to reach it, passing through the path, a visit is recommended.

The cave does not appear to have been registered or surveyed from the information available.