This walkway will make your knees weak

If you’re afraid of heights, then a trip to China’s Tianmen mountain probably isn’t the best idea!

The National Forest Park has opened a walkway 4,600ft above the ground and, terrifyingly, it has a glass-bottomed walkway.

If you're like me and can't even look out the window from one of the top floors of a building, the pictures are enough to make your knees feel wobbly.

But, it seems some people don't have this problem. They seem perfectly happy posing for a selfie or taking pictures looking directly through the transparent floor.