  We describe the analytical extension of certain static cylindrical
multi--cosmic string metrics to wormhole spacetimes with only one region at
spatial infinity, and investigate in detail the geometry of asymptotically
Minkowskian wormhole spacetimes generated by one or two cosmic strings. We find
that such wormholes tend to lengthen rather than shorten space travel. Possible
signatures of these wormholes are briefly discussed.
