Also see: The World's Most Impressive Subway Maps
New York announced this week it will again delay the 2nd Avenue Subway -- a chimerical line already half a century in the making. As New York's and many other subway systems undergo some of their biggest economic hardships in history and attempt to plan for the future, it's high time for a look down below at some of the world's best subway networks.
The sampling of systems here simply represent some of the best ideas and designs to be found underground, the kind of lines that make subterranean travel not just useful and life saving, but pleasurable. Even, dare we say, a little romantic.
More on Underground Rapid Mass Transit at TreeHugger
Restoring the Romance of Public Transportation
Navigate Subways Faster with Augmented Reality App (Video)
Yes, a Tragic Accident Rocked DC's Metro System. No, You Shouldn't Get Off the Train.
Study Shows Mass Transit is Green and Healthy
Subway Systems of The World