Final answer:
Machu Picchu, a 15th-century Inca citadel, was discovered in 1911 by American historian Hiram Bingham, bringing it to international attention.
Explanation:
Machu Picchu was the Inca city that was not found until 1911. It is a 15th-century citadel located in the Peruvian Andes, built as an estate for the Inca emperor Pachacuti. American historian Hiram Bingham brought Machu Picchu to international attention in 1911, making it known to the outside world.
Learn more about Inca Empire here:
https://brainly.com/question/24566635
