Gunung Padang is featuring an earth-and-stone step pyramid structure, characterizes the original culture of Nusantara (archipelago) that is referred to as "punden berundak". As well as the Temple of Poseidon was built in the center island (encircled by rings of water) which was a hill, having a similar character. The date of the Gunung Padang is also parallel to the Plato's date of Atlantis.
Do you have any additional info regarding these? Anything would be appreciated.