The United States Department of the Interior is a federal agency responsible for managing and conserving the nation's natural resources and cultural heritage. It oversees national parks, wildlife refuges, and public lands, ensuring their protection and sustainable use. The department also addresses issues related to Native American tribes and their lands. Established in 1849, the department plays a crucial role in environmental conservation and resource management. It includes various agencies, such as the National Park Service and the Bureau of Land Management, which work to preserve the country's natural beauty and promote outdoor recreation for the public.