One of my favourite stations on the Paris metro is Arts et Metiers. In contrast to the more usual tiled interiors, this station is lined with copper, giving it the feel of a steampunk submarine. Rivets, portholes and giant wheels and gears enhance the effect; even details like the litter bins are carefully co-ordinated. The portholes contain carefully-crafted little scenes. Beware, though: it's easy to be so caught up in these details that you forget to take your train!
It's not so surprising, then, that its Belgian designer François Schuiten is best known for his graphic novels in which Jules Verne frequently appears. The renovation was carried out in 1994, with the city transport authority working in partnership with the Musée des arts et métiers (Museum of Arts and Trades).