[Hoplite]

And they can be infinitely long if they exist only in the imagination.

[TigerLikesRooster]

Hmm.. I was watching CNN international broadcast reporting on Georgian crisis. It did show a pipeline project starting from Caspian Sea going through Turkey, crossing near Bosporus Strait, onto Balkans near(or through) Kosovo

While it was long, it did not look infinitely long.:-)