Tulum (Graph Theory) is a site of late Mayan culture, located in the northeast of Yucatan Peninsula, about 130 kilometers away from the famous resort of Cancun, situated on the edge of the Caribbean Sea coast. Once a religious city at the end of the Mayan culture in the 14th century, the site is now well preserved. Among them, there are more than 60 stone buildings, the most famous of which is the Grand Temple of Castillo, which stands above a 12-meter cliff.