Pirunpesä, Cave in Lyttylä, Pori, Finland
Pirunpesä is a cave formation made from multiple glacial boulders that have broken apart, creating passages and chambers throughout the system. The network extends for about 70 meters and contains both sunlit areas and completely dark sections.
Maps from the 1800s first recorded this natural formation, documenting its existence for geographic reference. It was later recognized as one of the longest cave systems in the country.
The name comes from Finnish folklore about supernatural beings that were believed to have created these stone formations. Local tradition shows how such stories shaped the way people connected with this natural place.
The entrance is reached by walking on a marked trail from parking areas near Lyttyläntie. Good footwear is important because the stone surfaces can be slippery, especially inside the dark sections where a flashlight helps with navigation.
The highest point inside rises about 10 meters above ground, creating unexpected vertical variation as you explore. This height difference makes the experience quite different from typical flat cave systems.
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