This will be my 1st entry in the b&w photocontest from 
@daveks.
@daveks.In this picture you are seeing a metro station in Vienna/Austria Late at night.
The lighting and the structures looked a little bit like a butterfly to me.
I used my Canon 5D mkIII with with a 17-35mm lens to capture this image.
Butterfly
Model Canon 5D mkIII
Shutter Speed 1/250 s
F-Stop f/2.8
ISO 2000
Lens Model Sigma 17-35mm f/2.8
Focal Length 17 mm
Thank you for reading and stay tuned for more images.