Hello,
The Zhangjiajie National Park has the largest glass bridge:
http://edition.cnn.com/2015/05/18/travel/zhangjiajie-glass-bridge/index.html
They invited some engineers to test the safety:
Do you dare to walk this bridge?
Bertus
The Zhangjiajie National Park has the largest glass bridge:
http://edition.cnn.com/2015/05/18/travel/zhangjiajie-glass-bridge/index.html
They invited some engineers to test the safety:
Do you dare to walk this bridge?
Bertus