The Great Wall stretches from Dandong in the east to Lop Lake in the west, along with an arc that roughly delineates the southern edge of Inner Mongolia. A comprehensive archaeological survey, using advanced technologies, has concluded that the Ming walls measure 8,850 km (5,500 mi). Built in stages from the 7th century BCE but with the majority of the existing wall built during the Ming Dynasty (1368–1644 CE).
The ‘New Seven Wonders of the World’ are sites and monuments chosen in 2007 through an online contest put on by a Swiss company, the New 7 Wonders Foundation, in which more than tens of millions of people voted. All are Unesco World Heritage sites.
These modern additions to the ancient Seven Wonders laid out by Philo of Byzantium in 250 BCE, which included the hanging gardens of Babylon and the pyramids of Giza. (Of those ancient seven, only the pyramids remain.)
Experience the New Seven Wonders of the World in seven 360° videos by the New York Times.