Paris Metro - Line 6
Viewed from Tour Montparnasse right after sunset.
Feel free to open this one in bigger size to check out the details
This photo is one of my favorites. Maybe because I am a transport geek. The metro in Paris is "famous" for how close to each other are its stations. This photo is a "proof".
Please also notice the contrast between the old majestic Parisian buildings and the new "ugly" buildings. Actually, on the right side of the line the buildings are old and on the left side they are mostly new.
One last thing I like about this pic is the light of the sunset falling nicely onto the rails