The Great Wall of China. One of the 7 wonders of the world heritage... At its widest, it is 9.1 metres (30 feet) at its base and 3.7. Location: Northern China Length: 21,196.18 km (13,170.7 mi), all known sections were measured Material delivery: by hand, rope, cart, goat Materials: stone, soil, sand, brick. The Great Wall, one of the greatest wonders of the world, was listed as a World Heritage by UNESCO in 1987. Just like a gigantic dragon, it winds up and down across deserts, grasslands, mountains and plateaus, stretching at north from east to west of China. Stunning place, where everyone’s should visit once in life! ? #greatwallofchina #humanity #unesco #unescoworldheritagesite #history #wonderoftheworld