The Massassi Site was an area located on Yavin 4, which is a moon covered in jungle and orbits the gas giant Yavin. This site contained several old structures, including the massive Great Temple, all constructed by the long-gone Massassi civilization.
This Massassi site was first seen in Star Wars: Episode IV A New Hope, the initial installment of the original trilogy, which originally premiered in 1977. The filming of its jungles and temples occurred at the Mayan ruins found within the Tikal National Park in Guatemala.