This cave was discovered by chance in 1961 during mining operations. Several tools from the Mousterian industry and stone artifacts from the Upper Paleolithic and Neolithic periods were found here. However, its most important find is a Neanderthal tooth, approximately 30,000 years old.

A rugged natural area offering landscapes of great natural beauty. High on the mountain, there is a large stone cross that marks the battle between the French and Anglo-Portuguese armies on August 17, 1808, during the first Napoleonic invasion, marking the beginning of the Peninsular War.

A cave discovered in 1880, nonetheless only regularly eexplored after 1963. Vestiges of the paleolithic, the neolithic and the bronze age have been uncovered here. A large part of the findings are currently in the Municipal Museum of Bombarral.