Interstates as Subway Diagram: 2011 Version by Cameron Booth
Artistic Value: Interesting Designs
Hipster subway map.
Rivers as subway maps.
National Park System as a Subway Map
The Milky Way as a subway map, and other creative derivatives of the London Tube map
IND 6th Ave Line Diagram by vanshnookenraggen, via Flickr
100 Diagrams That Changed the World | Brain Pickings
Visual> Infovis: maps and plans/ mapas y planos
Dada Visualization 1