When we think of the most beautiful natural spots around Paris, we rarely picture a former quarry. Yet that is the story of Grand-Voyeux, in Seine-et-Marne. Just an hour from the capital, this 241-hectare site is now 60% covered by water and is home to exceptional biodiversity. With its ponds, reed beds, and observation decks, some even compare it to a mini Baie de Somme in the Île-de-France region.
An ideal nature reserve to escape the hustle and bustle of Paris
It’s hard to imagine that sand and gravel were once extracted here. For several decades, heavy machinery dug into the ground, leaving behind vast cavities. Gradually, water filled these depressions, reeds took root along the banks, and birds made their homes here. Nature has reclaimed the area to such an extent that the site has become a regional nature reserve, part of the Natura 2000 network.
Here, the trail winds through bodies of water, wet meadows, and reed beds, with several wooden observation decks that allow visitors to watch wildlife without disturbing it. More than 225 bird species have already been recorded, including the kingfisher, the marsh harrier, the bluethroat, and the great crested grebe. Depending on the season, the landscape changes completely with the arrival of migratory birds or during nesting periods.
Le Grand-Voyeux has been deliberately preserved, and visits are supervised to minimize disturbance to the wildlife. A reservation is required to access the reserve, where a guide accompanies visitors at the start of the trail before letting them continue on their own.
Amid the reeds, ponds, and birds, the Grand-Voyeux Reserve is one of those still-little-known places that feels as though it’s much farther away than the Île-de-France region.
📍Location: Grand-Voyeux Nature Reserve – Rue du Stade, 77440 Congis-sur-Thérouanne