The Inca Empire is known for its elaborate road system and postal service. Spanning across the mountainous regions of South America, particularly in present-day Peru, Ecuador, and Chile, the Incan roads connected various parts of the vast empire, facilitating trade, communication, and military movement. This network, known as the Inca Road System, was approximately 25,000 miles long and featured advanced engineering, including suspension bridges and terracing. The Incan postal system, called "chasquis," used relay runners to quickly deliver messages and goods across this expansive road network, showcasing the sophistication of Inca infrastructure and administration.