A moving observation platform!
The Tateyama ropeway
Nowadays it has become a promenade, making it possible to stroll through this mysterious space.
If you ever have the chance to visit Kurobe Gorge, be sure to do the walk and experience it for yourself.
Kurobe Gorge and Unazuki Onsen are not on the Tateyama Kurobe Alpine Route. They are near to each other but accessed from different locations. The Alpine Route is awesome and I recommend staying a night along the Route (personal favourite is at Murodo) to fully explore the area.
Straddling Toyama Prefecture and Nagano Prefecture, this mountain sightseeing route traverses the Northern Alps, a stunning sequence of 3,000m peaks.