That morning, my friend was exhausted and was not able to walk. He needed to rest. So left him at the hotel and decided to go to Las Medulas by taxi.
Las Médulas is a historical site near the town of Ponferrada, it takes approximately 30 minutes by car, which used to be the most important gold mine in the Roman Empire.
Las Médulas, cultural landscape was listed by the UNESCO World Heritage Sites.
According to the record, six million of free labors were working in the mine of Las Medulas. The mine was producing the gold 20,000 pounds (roman pounds) every year, and yielded gold of 1.65 million kg in 250 years.
The ancient Roman planted chestnut trees for securing of food of the worker. When the gold was depleted, it was the time of the fall of the Roman Empire.
Rich chestnut trees grow thick now.