Walk the Great Wall of China online

It's a chance for people to learn more about its rich history, and understand how it's being preserved. They will be able to find high-resolution pictures, stories that tell the secrets behind it, such as hidden signatures on some of the bricks that were used as a quality-tracking method from the Ming Dynasty (1368-1644), and much more.

The Great Wall took over 2,000 years to construct over the course of five dynasties. It was listed as a World Cultural Heritage Site by UNESCO in 1987.