"The big picture like the building was discovered, but the artefacts which tell little details are missing, making a lot of stories untold about Si Thep," Tanachaya told AFP. "It's like a piece of puzzle was missing," she said. The 400-hectare complex, which archaeologists date back to between 1,500 to 1,700 years ago, may be inscribed in UNESCO's cultural world heritage list this week - Thailand's first addition since 1992.
AFP