m thierry / Creative Commons BY-SA
The Great Wall of China near Beijing. The wall, built from 220 BC to the 1600s, is the world's largest military structure and can be seen from the moon.
How our Bliss Filters work
m thierry / Creative Commons BY-SA
The Great Wall of China near Beijing. The wall, built from 220 BC to the 1600s, is the world's largest military structure and can be seen from the moon.
