Shibuya station of Ginza line Subway.
It is the first subway in Japan built in 80 yeas ago.It runs very shallow underground so we can quickly reach the underground platform but it puts a face out of a cliff at Shibuya. Because Shibuya is a deep valley.
With the redevelopment of Shibuya, it is also under rebuilding. I was surprised at the cantilever which does not support for tens of meters.