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Da anni nel suo tempo libero Massimo Lisignoli cerca le vecchie cave abbandonate di pietra ollare che costellano da secoli la Valchiavenna. Ne ha individuate un centinaio, a galleria o a cielo aperto. Abbiamo potuto accompagnarlo alla ricerca delle “trone.”
Scienza e Tecnologia
Alla ricerca delle cave di pietra
di Rosanna Pedrini e Artur Schmidt
Alla ricerca delle cave di Pietra
RSI Info 01.10.2018, 09:17
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