Vreten Tunnelbana metro station on the blue line in Stockholm, with art by Takashi Naraha called Himmelen av kub (The Heaven of Cube).
When exploring the metro with Dave Morrow, I discovered that some stations looked good with trains going past, while others suited an empty track. Vreten is one of those stations that suits the trains (in my opinion).
I feel that the orange trim of the carriages gives a nice colour boost to a quite monochromatic station and the ceiling blocks help balance out the off-centre main cube.