This Mysterious Underground Spring Is Breathtaking, But Its Depths Hide A Dark Secret

With its fluctuating colors and constant water flow, the Fosse Dionne spring is one of France’s most stunning attractions. Housed inside an ancient amphitheater, people continue to peer into the well today, curious as to what lies at the bottom. However, this beautiful landmark actually harbors a shocking secret beneath the surface.

The Fosse Dionne

Located in Tonnerre, France, the Fosse Dionne is arguably the community’s most famous spot. The spring can be found in the middle of a street, between a number of different houses. But the amphitheater itself is a few feet below the road’s surface, so you can look down into it.

A Special Spring

The Fosse Dionne produces a lot of water, which spews out from the spring’s stone wall. In total, as the BBC website has noted, roughly 68 gallons is released per second. Alongside that, The Travel webpage has reported that another 82 gallons flows into the attraction within the same time frame.

Unknown Source

Keeping that in mind, local residents have been asking themselves the same questions for hundreds of years now. Just where is this water coming from? And why is there so much of it? At first glance, the Fosse Dionne has no obvious source, yet some have theorized that the Morvan mountain region could be responsible.

Negative Edge

If that’s the case, though, you’d never be able to tell from just looking at the surface of the Fosse Dionne. Indeed, the water’s still and rather peaceful before flowing out at the edge of the amphitheater. But that’s not to say that the conditions remain the same throughout the year.