Chapelle de Rosemont, Volcanic cave in Sainte-Rose, Réunion Island, France.
The Chapelle de Rosemont is a volcanic cave located at the base of Piton de la Fournaise, shaped by natural lava formations from past eruptions. The cave sits within Réunion National Park and displays the rocky chambers and passages carved by ancient flows.
The cave was documented in 1791 by artist J.J. Patu de Rosemont during an expedition led by naturalist Joseph Hubert and Captain Alexis Bert. In July 2018, lava flows from Piton de la Fournaise completely engulfed the entrance and permanently altered this formation.
The cave represents a significant geological landmark within Réunion National Park, contributing to the understanding of volcanic processes in the Indian Ocean.
The site sits at high elevation on the volcano's slopes and is reached via hiking trails that connect through the park network. Conditions can be demanding, so sturdy footwear and decent fitness are essential for the journey.
The formation was the subject of artistic documentation in the late 1700s and was later completely buried by modern lava flows. This fate makes it a rare geological story where active volcanic forces continue to reshape the landscape.
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