Archaeologists in Spain were very surprised to discover in a dense forest the ruins of a powerful 5th-century fortress surrounded
Researchers discovered a fortress at the tophill in northwest Spain using lidar. So they “looked” under the forest covering the ruins and found an early medieval fortress with an area of about 10 hectares with 30 towers and a defensive wall approximately 1.2 km in length.
Lidar is a technology for measuring distances by emitting light and measuring how long it takes for that reflected light to return to a receiver.
A place called Castro Valente ("Brave"fort") is located in the Padron district of the Galicia region. Local residents believed that the “fort” was built around the 9th century BC. e. the Celts who lived in Galicia at that time. However, analysis of the fortress's layout, construction and fragments of pottery inside showed that it appeared after the Roman Empire lost control of the region around the beginning of the 5th century AD. e., when Spain was attacked by German invaders.
However, the site was abandoned about 200 years later, perhaps because it was no longer needed. Now scientists hope to protect it from the construction of roads and wind farms.
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