Furninha, Archaeological cave on the southern slope of Peniche peninsula, Portugal
Furninha is a limestone cave on the southern slope of the Peniche peninsula with multiple chambers and geological formations visible in the rock walls. The cave extends into the cliffs between Peniche Fortress and Cape Carvoeiro, showing clear rock layering and natural erosion patterns.
The cave was investigated by Nery Delgado in the late 1800s and revealed traces of both Neanderthals and early modern humans spanning more than 40,000 years. These excavations showed that people of different types lived at this location across a long time period.
The name Furninha comes from the Portuguese word for small opening. Today visitors can see colorful lichens and mosses covering the cave entrance, thriving in the damp coastal conditions.
Access to the cave is limited and requires permission from local authorities due to its archaeological importance and safety concerns. Visitors should coordinate with local experts beforehand to understand access options and necessary precautions before visiting.
The cave walls are covered with a colorful biofilm of algae and bacteria created by rainwater and seawater mixing as it enters through the ceiling opening. This living film shifts in color depending on the season and angle of light.
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