The country famous for the ancient ruins of Machu Picchu is Peru. This iconic site, a UNESCO World Heritage Site, is located in the Andes Mountains and is known for its well-preserved Incan architecture and stunning natural scenery. Believed to have been built in the 15th century during the reign of the Inca emperor Pachacuti, Machu Picchu served as an estate for the emperor and a religious site. It is often referred to as the "Lost City of the Incas" and draws thousands of tourists each year eager to explore its history and breathtaking landscapes.