The ancient ritual dates back to the 16th century and is a regular meeting of ritual believers participating in sexual acts, with the view that it brings good luck and fortune.
From married men, housewives, government officials and prostitutes, there’s a variety of people who participate.
And for a country and religion where sex out of wedlock is taboo, Mr Abboud says the idea of a mountain top sex ritual for Muslims in Indonesia seems very strange.
‘Back in the 16th century, a young Indonesian prince had an affair with his step mother,’ he said.
‘They ran away to the mountain and had sex and mid coitus they were caught, killed and buried.
‘There is a shrine there now and because they didn’t get to finish the act, others believe that if you do, fortune will come to you, most people like poor farmers who want to get ahead in life.’
He says he saw no Westerners there but people come from all over Indonesia to see if their luck would change.
‘It’s a Javanese ritual which is very different to the Muslim world, very different to everywhere else in Indonesia, the beliefs are a blend of Islamic, Hindi and Buddhism,’ he said.
So popular the ritual has now turned into a tourist attraction for locals with the government charging people to go there, with stalls and even buskers.
‘It’s a bit of a carnival.’ ‘It’s contradictory, the government knows adultery is happening yet they’re preaching something different and turning a blind eye,’ he said.