Tumuli are ancient burial mounds, often constructed from earth and stones, that serve as tombs for the deceased. These structures can vary in size and shape, depending on the culture and time period in which they were built. Tumuli are commonly found in various regions around the world, including Europe, Asia, and the Americas. The construction of tumuli dates back thousands of years and is associated with different civilizations, such as the Mound Builders in North America and the Scythians in Eurasia. Archaeologists study these mounds to learn about the burial practices, social structures, and beliefs of the cultures that created them.