The method, in which hundreds of thousands of laser pulses are fired per second from an aircraft flying over the land, has an area of about 10 hectares, 30 towers and a defensive wall of approximately 1.2 km.
The castle appears to have been built in the first half of the 5th century AD, possibly over an earlier Iron Age fort, to defend against Germanic invaders after Roman control over the area fell, research author Mario Fernandez-Pereiro told Live. Science. However, the castle appears to have been abandoned after nearly 200 years.
Future research may reveal more information about it and protect it from development, for example from roads or wind farms.
Source: Ferra
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