Swords into ploughshares ... and spokes.

Am I going to get back into bicycling some day? For a very long time, it was a "bucket list" item to bike from Scandinavia to the Mediterranean. Then I became a walker.

Now that the ideal route for a south-to-north ride has been revealed, it means that I'll have to (a) find the time, and (b) get the posterior re-calloused.

Or: Just walk it instead.

It was once the world's most important political border — now it's a bike path, produced by David Leveille (PRI's The World)

We're looking for name of the geo-political border that once stretched from the Barents Sea to the Black Sea. During the Cold War, this border separated the Communist East from the capitalist European West.

Now that the Cold War is over — we think — the demarcation has taken on a less foreboding role: It's now a bike path.

Can you name it?