Obří hrad oppidum

It is not entirely clear who exactly built the massively fortified site at an altitude of 1000 meters above sea level. Allegedly, these are the remains of a Celtic cult site, which is shrouded in a number of mysteries and secrets. The wall was 3-4 m wide and 3-5 m high. Why did someone put in so much effort to fortify a place in the middle of wild mountains where there is nothing far and wide? Why are fortifications in places that are of no strategic importance at all? And from the third question it freezes. In many places, there are signs of a catastrophe that no human hand could have caused. Who caused these scenes? It is thought that either it was a cult place or a fortress to protect the mined gold. It was not a residential fort, because there were no signs that people lived here permanently.