Beaujolais UNESCO Global Geopark
Très Beaujolais

Glay limestone quarries

This was once a yellow limestone extraction site characteristic of the southern Beaujolais. It supplied the region in construction material for centuries. As the only visitable quarry in the Rhône area, it is also a natural area of ecological interest.


This limestone formed from 175 million years ago, a time when Beaujolais region was covered by ocean, was a good building material. The extraction of rocks has, over the years, created shelters for bats, and the argilo-limestone subsoil is covered by a great diversity of plants. There more than 300 species in total, from the common deciduous trees to the rarer orchids.

The site stands clear of all this vegetation and offers stunning views over the Azergues valley, the Tarare hills, and some of the Lyonnais hills.

The Glay quarry makes for an interesting visit, with explanatory signs dotted along a path and guided tours provided by the "Carrières de Glay" association to help you find out all about the history of the site.

Glay limestone quarries
Impasse des Carrières, St Germain
69210 Saint-Germain-Nuelles

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Geopark Beaujolais

Famous throughout the world for its wines and vineyards, the Beaujolais is also a region shaped by man, who has reaped the benefits of the soil's diversity. Its past is literally written in stone: in the golden, red, white, grey or black rocks and stones that have visibly been put to good use in local construction. This remarkable geology has given rise to great diversity, not only in the landscapes and heritage, but also in terms of human activity, in the culture and traditions that form the identity of the Beaujolais region.