'A small part of its 4,000-mile link is seen here'
Great Wall of China
THAT'S GREAT: A small part of its 4,000-mile link is seen here
A small part of its 4,000-mile link is seen here
A small part of its 4,000-mile link is seen here
THAT'S "GREAT"
Great Wall of China
THAT'S "GREAT"