From metropolitan cities and ancient Inca ruins to remote jungle lodges, this 16-day exploration of Peru's history and nature is perfect for the adventurous traveler. Start in Lima, Peru's capital city, then continue to the Amazon rainforest. Spend a few days deep in the Amazon exploring the jungle and seeing rare wildlife. Next, head to the imperial Inca capital of Cusco to explore narrow cobblestone streets and 15th-century archaeological sites. Then, embark on the Salkantay Trek to get some breathtaking views of the Sacred Valley. End your trek at Machu Picchu, and spend a day immersed in the beauty and history of its ancient ruins. Reward your hard work with two relaxing days exploring the villages and historical sights of the Sacred Valley. Finally, head back to Cusco and summit the colorful Rainbow Mountain.