Abstract
＜Research Note＞
I have compiled the main Angkor heritages in chronological order, and written down some of the mysteries and unsolved points that remain in these heritages. Also considered the legacy left by the Khmer dynasty, which was also an empire of water. During the Khmer Empire, this area was able to produce three or four crops in a year, but now it seems that only one crop can be produced in the rainy season. It is just as an example of the greater productivity of the past; Angkor offers important insights for modern society.
