Floorcrunch spotted this amazing abstract effect where and "artist changed an abstract subway map into a concrete (or rather: glass and ceramic) tiling project covering three walls and the floor of this otherwise unremarkable bathroom."
The Dornob blog spoke to the artist Christoph Niemann who "started, of course, with a generic map of the New York City subway route system and abstracted it until arriving at a configuration that could be applied in straightforward square tile installation (art). Somewhere between pop art and abstract decor, this tile pattern is custom and unique to the place – but there is nothing to suggest that the savvy do-it-yourself type could not replicate the process in some form to crate a likewise personalized mosaic tile pattern for their own home bathroom interior (for that matter, would these not look neat in, say, the bathroom of the subway stations of NYC?)."
Or Tube toilets? Come on TfL, you know you want to, it would brighten them up no end! Although I imagine they'd be a bit disorientating, if you wandered into the loo slightly worse for wear & got hypnotised by the spiralling Circle Line. It might also encourage drunk blokes to follow certain routes, a la writing one's name in the snow!