Buco del Piombo, Show cave and geological formation in Erba, Italy.
Buco del Piombo is a show cave near Erba with a dramatic limestone entrance. Water has carved intricate formations inside the rock over thousands of years.
The cave was inhabited by people in ancient times, as archaeological finds reveal. Excavations have uncovered evidence of human activity from earlier periods.
The site contains a significant collection of bear bones and Paleolithic tools, now exhibited at the Civic Museum of Erba.
The cave is reachable from Alpe del Vicerè via marked hiking trails. The interior is closed to visitors for safety, but you can view the entrance from outside.
The name comes from the lead-gray color coating the rocks, created by limestone weathering. This distinctive coating gives the cave its visual character.
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