During this first trip Humboldt visited the Chayma and Guarauno Missions. He also climbed to the summit of the Tumiriquiri, and went down into the Guacharo cavern, the entrance to which, framed as it is with the most luxuriant vegetation, is truly magnificent. From it issues a considerable river, and its dim recesses echo to the gloomy notes of birds. It is the Acheron of the Chayma Indians, for, according to their mythology and that of the natives of Orinoco, the souls of the dead go to this cavern. To go down into the Guacharo signifies in their language to die.
The Indians go into the Guacharo cavern once a year, in the middle of summer, and destroy the greater number of the nests in it with long poles. At this time many thousands of birds die a violent death, and the old inhabitants o
