Big river with green island with mountain background. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3287203/free-photo-image-nature-colombia-adventureFree Image from public domain licenseHeavenly sky & mountain background. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3304869/free-photo-image-cielo-nubes-azul-nature-creative-commonsFree Image from public domain licenseClose up of cherry blossom branch in Spring. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3302066/free-photo-image-apiaceae-blossom-blur-backgroundFree Image from public domain licenseQuatro libros de la naturaleza, y virtudes de las plantas, y animales que estan recevidos en el uso de medicina en la Nueva… https://www.rawpixel.com/image/14008378/image-paper-book-artFree Image from public domain license[Nueva filosofia dela naturaleza del hombre, no conocida ni alcançada de los grandes filosofos antiguos: la qual mejora la… https://www.rawpixel.com/image/13998932/image-paper-cartoon-bookFree Image from public domain license