Machu Picchu: The historic "lost city" of Peru needs no introduction. The Inca citadel built in the 15th century has something to offer everyone - amazing vistas of the surroundings, Inca ruins to explore, and, for added fun, free-roaming llamas. Adventurous souls can climb Huayna Picchu or Machu Picchu Mountain, or the Inca Trail. With facilities such as food joints, shopping centers, and hot springs in nearby Machu Picchu Town (also known as Aguas Calientes), Machu Picchu has something for everybody.