The "Pyramids of the World" refer to various pyramid structures found in different cultures and regions. The most famous is the Great Pyramid of Giza in Egypt, built around 2580–2560 BCE as a tomb for the pharaoh Khufu. Other notable pyramids include the Mesoamerican pyramids like the Pyramid of the Sun in Teotihuacan and the Maya pyramids in Chichen Itza. These pyramids served various purposes, including religious ceremonies and burial sites. They are often characterized by their triangular shape and monumental size, showcasing the architectural skills of ancient civilizations. Many pyramids, such as those in Sudan and China, reflect the diverse cultural significance of these structures across the globe.