This country's Grand Canyon, with its awe-inspiring layers of sculpted rich, red rock, is a marvel that draws millions of tourists to gape at its beauty or climb its rugged walls. The Historic Sanctuary of Machu Picchu in Peru is a collection of dramatic landscapes and buildings that are considered the most valuable remains of the Inca civilization.
The Grand Canyon and Machu Picchu are UNESCO World Heritage sites. Of just over a thousand sites worldwide deemed of universal importance and value to humankind, there are only 24 in the United States that carry that distinction.
