Princess Mako, a niece of Emperor Naruhito, visited the ancient Inca ruins of Machu Picchu in Peru on Saturday as part of her six-day visit to the country.The 27-year-old princess took a two-hour tour to a temple and canals on the ruins on a mountaintop at an altitude of about 2,400 meters."There's something words can't describe," the princess said, as she looked down on the UNESCO World Heritage-listed citadel from a nearby hill.Related coverage:Japan's Princess Mako meets with Bolivian presidentJapan's Princess Mako meets with Peruvian presidentREAD FULL ARTICLE