The ancient structure located in Mexico known as a wonder of the world is El Castillo, also referred to as the Temple of Kukulcán. This pyramid is located at the archaeological site of Chichen Itza, a significant city during the Maya civilization. Constructed in the 10th century, El Castillo is renowned for its astronomical significance and aligns with the sun during equinoxes, creating the illusion of a serpent descending the pyramid. The structure symbolizes the Mayan architectural and mathematical prowess and attracts visitors from around the globe, highlighting its importance as a UNESCO World Heritage Site.