The Code of FIVE at Gunung Padang | Ancient Mystery in Indonesia Gunung Padang, a site often called the largest megalithic structure in Southeast Asia. What makes it unique is the mystery of the number five: The site is built from countless five-sided stones It rises in five terraces stacked into the hillside It is surrounded by five mountains in all directions Some researchers claim it may be over 12,000 years old, far older than official history admits. Was the number five chosen by accident?