This has always been a sacred wood, part of Lucus Dei (a vast forest preferred by Apollo) and therefore left untouched by the Romans.
In 1275 the Marquess of Monferrato assigned 1400 "wood days" to the inhabitants of Trino: they thus became the commoners who excluded the wood from rice monoculture, saving one of the last patches of flatland forest.
The flowering of daffodils and lilies of the valley is extraordinary in the spring.