There were Fiants on Earth.
Here are the discoveries under the Grand Cannion.
There are Egyptian Statues of large peoples under the Grand Cannion. The cave have been discovered over 100 years ago at least. Smisonian Museum in Washington DC has sample of gold statues found in these caves.
They have illumination systems bases oŹ»nnsome sort of gas that were functional 100 years ago. There are books about these discoveries.