What empire was the largest in both Americas?

The largest empire in the Americas was the Inca Empire, which flourished in the Andean region of South America from the early 15th century until the Spanish conquest in the 1530s. At its height, the Inca Empire stretched over 2,500 miles along the western coast, encompassing present-day Peru, Ecuador, Bolivia, and parts of Chile and Argentina. The Incas were known for their advanced agricultural practices, impressive architectural achievements, and extensive road systems that facilitated communication and trade across diverse terrains.