The Great Wall of China is where you find all sorts of fortifications -- natural and manmade -- including walls, beacon towers, fortresses, passes, and trenches that started being built in the 7th century BC throughout almost the entire imperial era. The latest survey established that remnants of these defense structures can be found in 15 provinces, municipalities and autonomous regions. Some of them are ruins for historians to lament, while others attract global visitors and shutterbugs. Browse this online feature to check out these precious resources and plan your next Great Wall trip.
