Machu Picchu and Pompeii are both ancient RUINS that have become popular tourist destinations. Machu Picchu is an Incan citadel located in the Andes Mountains of Peru, built in the 15th century. Pompeii is a ruined Roman city near modern-day Naples, Italy, which was destroyed by the eruption of Mount Vesuvius in 79 AD. Both sites offer visitors a glimpse into the past and are considered to be some of the most important archaeological sites in the world.