The Inca empire also known as Incan empire and the Inka, was the largest empire in Pre-Columbia America.
Its political and administrative structure is considered by most scholars to have been the most developed in the Americas before Columbus' arrival.
The Pacific Northwest, sometimes referred to as Cascadia, is a geographic region in western North America bounded by the Pacific Ocean to the west and by the Cascade Mountain Range on the east.
The Ancient Puebloans (Anasazi) were a prehistoric Native American civilization centered around the present day Four Corners area of the Southwest United States. The ancestors of the modern Pueblo peoples, including the Hopi, Zuni and the Puebloans, do not prefer the term “Anasazi.”
The various cultures collectively termed "Mound Builders" were inhabitants of North America who, during a circa 5,000-year period, constructed various styles of earthen mounds for religious, ceremonial, burial, and elite residential purposes.
The Eastern Woodlands is a cultural area of the indigenous people of North America. The Eastern Woodlands extended roughly from the Atlantic Ocean to the eastern Great Plains, and from the Great Lakes region to the Gulf of Mexico, which is now the eastern United States and Canada.