The origin of the Museum dates from 1961, the year in which the Commune granted to the Naturalist Speleological Association of Maremma a temporary site in which to keep its collections. But it was only thanks to the success of an exhibition held in 1967 that it was decided to create a Museum of Natural History, which has been open to the public since 1971.

The naturalist specimens, coming for the most part from southern Tuscany, are divided into various sections: rocks and minerals, insects, seashells, birds, reptiles and amphibians, mammals and palaeontological findings (fossilised bones and shells).