They are home to the alerce tree (Fitzroya cupressoides) - the southern hemisphere’s equivalent of the ancient redwood of the Pacific Northwest - which can reach heights of 115m and live for more than 3,000 years, and the endemic monkey puzzle tree (Araucaria araucana).
These native forests harbour an incredible wealth of wildlife, including the magellanic woodpecker (Campephilus magellanicus), South America's largest woodpecker, and the pudu (Pudu pudu), one of the world's smallest deer.
But the Valdivian forests - and the species that live there - are threatened by intensive logging and expansion of timber plantations.
WWF is working to confront these threats by developing conservation projects with local and indigenous communities, collaborating with the private sector to promote sustainable business practices, and ensuring that government regulations are aimed at protecting people and nature.
With 40% of the native forest remaining, there is still an opportunity to ensure the long-term health of this ancient land.
Life at sea
The waters are also home to numerous other marine species, including humpback, sei and sperm whales, and sea lions, seals and several dolphin species.
Threatened by fishing, aquaculture and shipping traffic, WWF and its partners are working towards the creation of a marine protected area to secure the survival of the whale population.