The Inca city hidden high in the Andes Mountains. Built in the 15th century under Emperor Pachacuti, it served as a royal and spiritual center, carefully integrated into its natural environment. Featuring advanced stonework, agricultural terraces, and astronomical alignments, Machu Picchu reflects the Inca worldview of harmony between humans, nature, and the cosmos. Abandoned after the Spanish conquest and rediscovered in 1911, it remains one of the world’s greatest symbols of ancient engineering and spiritual balance.