Xibalba is a place that some people used to believe in a long time ago. They believe that it was a very scary, dark underworld where people go after they die. It was believed that the people who ended up in Xibalba would be trapped there forever and that they would suffer a lot. It was also believed that Xibalba was ruled by two scary gods who liked to trick and trap people. People used to do things like offer sacrifices and prayers to try to avoid going to Xibalba after they died. Nowadays, some people still talk about Xibalba, but most people don't believe in it anymore.