What would a "geographically ambiguous location" be? An airport or a train station, like in the Scotland Yard game maybe?[1]

[1] A team of players tryies to track down a solo player on a map with taxi, bus and subway lines. The solo player is invisible and has to give his location every five moves. The best place to be for this is on a subway station, because it means one can get away in many directions quickly.