"I love the energy this place has," says Exsekias Trivoulides who has pitched his tent on what he considers to be the holy site of Mount Olympus.

Trivoulides is a sculptor who studied art history and classics, and these days, he is living his passion.

Along with a few thousand others he is taking part in the Prometheia festival, which celebrates the ancient Greek hero Prometheus, who helped humans by stealing fire from the gods.

It's the most important annual festival for followers of The Return of the Hellenes - a movement trying to bring back the religion, values, philosophy and way of life of ancient Greece, more than 16 centuries after it was replaced by Christianity.

These people consider Greece to be a country under Christian occupation.