The ancient structure located in Peru is Machu Picchu. This iconic site is an ancient Incan citadel situated in the Andes Mountains and is renowned for its archaeological significance and stunning architecture. Believed to have been built in the 15th century, Machu Picchu showcases advanced Incan engineering and terracing techniques. It is a UNESCO World Heritage site and one of the most visited tourist attractions in South America, attracting nature lovers and history enthusiasts alike due to its breathtaking scenery and cultural heritage.