Java: human skeletons lying in a valley poisoned by volcanic gases, being watched by travellers. Coloured aquatint. https://www.rawpixel.com/image/13968832/image-plant-person-treeFree Image from public domain licenseMichel Boai, a "chin performer" (on the guitar), performing with his associates, his wife playing the guitar and M. Engels… https://www.rawpixel.com/image/13967295/image-person-art-patternFree Image from public domain license