The largest megalithic site in Southeast Asia is Gunung Padang (Mountain Meadow in Indonesian), located in West Java. The site has been known by Europeans since the early 20th century, when it was mentioned in a Dutch report on Indonesian antiquities.
The site is noted for the huge rectangular stones that cover it. Beneath those stones, geologist Dr. Danny Hilman believes, is located an even more ancient pyramid. Judging from the age of the debris above it, Hilman believes that the pyramid would be at least 9,000 years old, and possibly up to 20,000 years old.