Which ancient city was built by the Inca people on a mountaintop in the Andes Mountains?

Machu Picchu is renowned for being an iconic ancient city constructed by the Inca civilization high in the Andes Mountains of Peru. This site, often referred to as the "lost city of the Incas," was built in the 15th century and is widely considered a masterpiece of Incan architecture and engineering. Its strategic location on a steep ridge allows for impressive views and was likely chosen for both its natural beauty and its defensive advantages. The site showcases advanced agricultural, religious, and astronomical features, reflecting the complex and sophisticated society of the Incas.

In contrast, other options like Teotihuacan, Cuzco, and Tenochtitlan represent significant Mesoamerican and Andean cities but are not located in the Andes Mountains nor constructed by the Incas. Teotihuacan, for instance, is a major ancient city in Mexico known for its large pyramids and urban layout but predates the Inca civilization. Cuzco was the capital of the Inca Empire and an important cultural and political center but is distinct from Machu Picchu. Tenochtitlan was the capital of the Aztec Empire, located on an island in Lake Texcoco in present-day Mexico City, making it unrelated to the In