Sacsayhuamán, located in Cusco, Peru, is a citadel built by the Incas in the 15th century. The site features massive dry stone walls constructed with precision and skill, showcasing the impressive engineering abilities of the Inca Empire. Overlooking the city, Sacsayhuamán offers a stunning view of the valley below and is now a popular tourist destination. Despite being partially dismantled by the Spanish for construction materials, the remaining ruins continue to amaze visitors with their intricate stonework and historical significance.