what is considered the greatest example of Incan engineering

One of the greatest examples of Incan engineering is Machu Picchu. Machu Picchu is an ancient Incan city located high in the Andes Mountains in present-day Peru. It is known for its incredible stone architecture and clever engineering techniques. The Inca built terraces, walls, and structures that have withstood centuries of earthquakes, heavy rains, and other natural disasters. Machu Picchu is also renowned for its sophisticated water management system, which includes fountains, channels, and drains that distribute water throughout the site and prevent flooding. This remarkable engineering achievement showcases the advanced skills and knowledge of the Inca civilization.