The uvala of Chaudezembre

In areas with a karstic relief, a uvala is a large sinkhole formed by the coalescence or union of several small sinkholes. Here, the land collapsed into a 60-metre-deep chasm, over a circular surface area of around 550 metres in diameter. Note the peat bog that has formed at the bottom of the depression, an actual micro-ecosystem has developed here as a result of this geological formation. Traces of its exploitation are still very visible.