Adena refers to a prehistoric Native American culture that thrived in the Ohio Valley around 1000 BCE to 200 CE. Known for their impressive earthworks, the Adena people built large burial mounds and ceremonial sites, showcasing their advanced understanding of construction and community organization. These mounds often contained artifacts like pottery, tools, and jewelry, reflecting their artistic skills and social structure. The Adena culture is often associated with the later Hopewell culture, which expanded on their traditions. Both cultures played a significant role in the development of early Native American societies in the region, influencing trade, art, and spiritual practices that would shape future generations.