Cusco or Cuzco is a city in southeastern Peru, near the Sacred Valley of the Andes mountain range and the Huatanay river. It is the capital of the eponymous province and department. The city was the capital of the Inca Empire until the 16th-century Spanish conquest. In 1983, Cusco was declared a World Heritage Site by UNESCO with the title "City of Cusco". It has become a major tourist destination, hosting over 2 million visitors a year and providing passage to numerous Incan ruins, such as Machu Picchu, one of the Seven modern wonders of the world and others. The Constitution of Peru designates the city as the Historical Capital of Peru.