Bayon is a type of temple in Cambodia that was built a long time ago by people we call the Khmer. It is a really special temple because it has lots of big faces carved into the stone. It is like a big puzzle, with lots of different parts that fit together to make one big temple. It was built a long, long time ago for their king, who was very important to them. People still go to visit the Bayon temple today because it is so incredible and helps us learn about the history of Cambodia.