In this museum dedicated to "Man in Nature," is kept the works of Antonio Nuñez Jimenez (1923-1998), Cuban explorer (Andes, China, Antarctic, North Pole, Galapagos, Easter Island), who was a naturalist long before the liberation of Cuba. At 17, he founded the Sociedad Espeleológica Cuba. He earned two doctorates in La Habana, in Philosophy and Letters in 1951.

Three years later, the dictator Batista demanded that all copies of his first book "Geografia de Cuba" be destroyed because it described too well the misery of Cubans under his corrupted power.

Nuñez Jimenez fought alongside the Che. At the begining of the Revoulcion, Fidel appointed him first director of the institute which undertook the first (capital) action of the Revolucion : the agrarian reform. He succeeded Guevara as President of the National Bank of Cuba and was the founding president of the Nueva Academia de Ciencias, then Deputy Minister of Culture and President of the National Commission of Monuments.

Recognized around the world, he was a member of the US National Speleological Society and the National Geographic Society in 1987 and managed an extraordinary journey of 17,422 kilometers down the Amazon bassin by canoe from the river's source all the way to the Bahamas.

His numerous explorations of the many caves that dot the underground of the island, this extra ordinary human being was seen at the end of his life as "the fourth discoverer of Cuba", with the same importance as Cristóbal Colón, Alejandro de Humboldt and Fernando Ortiz.

Artifacts from his collection of personal items, his literary works (190 books and hundreds of articles and conferences) and photos, one of the largest collections in the country are all at the Fundacion offices.