Some might say that thick fog is not ideal to experience a mountain, but I beg to differ on this account. The Tianmen Mountain in Hunan, China, with the Guigu Cliffs and narrow exposed walkways was still awe-inspiring cloaked in mist.
This suspension bridge over a gorge was impressive because you could not see all the way across and the whole structure bounced as you walked across it.
Geek in the Hills 