This breathtaking archaeological site is shrouded in mystery, which is likely one of the reasons that it attracted 1.4 millions visitors in 2016. Thought to be a lost city that was once inhabited by the Incas, Machu Picchu was discovered in 1911 after being hidden by the jungle for over four centuries.

While many call the attraction an expensive rip off, it would be shame to visit Peru and not see its most impressive tourist spot — especially if you hike up to the ruins and catch them at sunrise when they're most stunning. Plus, the Peruvian government recently introduced visitor restrictions for the site, requiring all visitors to either purchase a morning or afternoon ticket, which should help to stem the flow of tourists.