Mark Leong/ Redux The Great Wall of China is 4,000 miles long and much of ... "They cost only ten yuan [$1.40]," he says, "but I wear out a pair every two weeks." I do a quick calculation: over ...

Just north of Beijing, you'll find one of the most famous monuments in the world: the Great Wall of China. Although it's unlikely you'll see the whole thing, you should aim to experience a portion ...