I made an interactive art installation on this question once: A black box with a knob where you could adjust how much time you have, then it would offer you (Google streetview) panoramas of the locations it found within your distance, and in the end even print a paper slip with your travel itinerary to take with you. The installation used realtime data (Google directions API): I somehow figured out, that if I would r…
Very often "within a 10 minute walk of ANY train station" is preferable to "halfway between us", even if the train ride is 1 hour, because I can actually work (or catch up on sleep) on a train. Especially if that "halfway between us" is somewhere without transit which means I need to drive the whole way there.