Just north of Beijing, you'll find one of the most famous monuments in the world: the Great Wall of China ... This can create mob-like scenes that can spoil the trip, but it's unpredictable.

China is building a 'Solar Great Wall' to power a city the size of Beijing. The project, stretching 400 km, will generate up to 100 gigawatts by 2030. Located in Inner Mongolia's Kubuqi Desert ...