Roman Mining in Valongo - Portugal

[@-meganeura]

Great work! I would love to learn more about this, can you please make a documentary like this for rios Alva e Ceira and roman mines of Góis?

[@SerGio-xs9ss]

When i was 18y.o. i went there with a friend in search of antimony ore, and we found some crystals for our mineralogical collections.
Good old times.