The Fosse Dionne, nestled in the cute town of Tonnerre in Burgundy, is a captivating circular well. We stop in Tonnerre on a whim to stretch the legs en route from Abbaye de Fontenay to Auxerre and by luck we discover this natuaral spring.
Sacred first to the Celts, the structure itself is more likely Roman, as is the name. Fosse Dionne, is derived from the Roman deity Dionysus. The name is reflective of the well’s ongoing historical significance as a place of spiritual and communal importance.
Renowned for its stunning appearance with deep turquoise colored water and high stone walls, it’s also somewhat mysterious. The water’s clarity and colour, plus the unusual circular shape creates a bit of a mesmerizing effect. It draws me in. But don’t get too close! The depth is a plunging 10m or so straight down into the earth. No one knows for sure as the exact depth is impossible to measure given the constantly flowing water and the darkened interior. Impressive to say the least.
One of the most intriguing aspects of the Fosse Dionne, however, is its connection to local legends and myths. Historically, it is believed to have possessed healing powers and people would visit to seek cures for ailments or to make offerings. The well’s waters, sourced from the deep underground springs, contribute to its perpetual flow of around 200 litres per second. This and its pristine clarity make it somewhat of an intoxicating interlude.
Architecturally, the Fosse Dionne reflects the Romanesque style, characterized by the sturdy, circular stone structure that frames the well. The surrounding area is also rather charming, with medieval buildings and narrow streets. These seem to enhance the historic atmosphere and air of mystery. If it wasn’t so utterly, bonechillingly cold already, I’d be extremely tempted for a dip.
Drawing ourselves away, we continue on down the road, feeling like we’ve missed more than we’ve seen during our little Tonnerre interlude.
Good To Know
The Fosse Dionne is, perhaps, Tonnerre’s most famous landmark. However, there are lots of vineyards and pretty countryside around to explore. Plus a château or two in proximity.
Would I Return?
Yes. Maybe in summer.