<http://schema.org/about>
"What can we say, we love beautiful transit maps. They're a modern artform, and while some are just traditional maps, others put an interesting twist on things."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/slideshows/public-transportation/public-transit-art-map-london-underground-also-working-radio-circuit-board/page/2/>