The characteristic evolutionary aspects of the Valle d'Aosta geology are on display, not only in the museum facilities and mines open to visitors, but also in the 2 rock gardens set up in Pollein(plain to the East of Aosta) and in Fontainemore (Lys valley).

The exhibition trails of nature, designed for the most part with inorganic materials, require special care to stir interest and positive suggestions among visitors; those who design them are almost obliged to produce contaminations with experiences and visual and sensory arts - from photography to sculpture - focusing on the use of inert materials, whereas the plants and flowers, which are an integral part of the territory and of the scenery, act as pleasant “corollaries”.

Rock gardens are now globally widespread throughout the planet, so much so that some of them, especially in Japan and California, have become cultural works where the aesthetic value of the poetry of volumes and lights has come to be ranked on a par and at times above the didactic and divulgative value, in an almost zen-like perceptive groove.

The rock gardens in the Valle d'Aosta lead us with simplicity and rigour along lithological arrangements belonging to the Alpine mineralogy, working on the scientific curiosity, enriched by ludic moments or pleasant aesthetic contrasts of shapes and dimensions.