Cork, the most environmentally friendly material in the world. The forest of cork oak, the richer biodiversity environment in the Mediterranean. The work of the "barker", a romantic craft dating back to the time of the nuraghes and that no technological apparatus has succeeded in replacing it. Man, his strength and his sensitivity to obtain from nature, in a minimally invasive manner, a rich and eclectic material. We will discover the secrets of this millennial craft and this noble material, immersed in the welcoming Mediterranean forest, one of the most important atmospheric filters and biodiversity chests of the entire planet. We will understand why it is so important to keep alive the use of cork and what function do the cork for our environment and for the richness of life. Hundreds of plant and animal species live in symbiosis in the shadow or among the branches of these majestic queens, the oaks. And we will encounter many, plant and animal species, and oaks.