My gaming youth meets my Washington DC present in Dave Delisle's geeky map mock-up of the DC Metro Map.
You have to love the detail of this. Dungeons for transfer stations, boats on the Potomac, airships representing National and Dulles airports.
But he even went above and beyond to include pipes for connecting rail stations, Rush Only service areas, and even made two totally different maps representing the two phases of the Silver Line.
Prints & Posters of both versions are available for purchase through his website.