I remember sitting in a courtyard of a hotel in Paris with a beer in hand, and a book, when an American woman entered and began to talk to me. The hotel backed onto a major railway line that went from Gare Saint Lazare out to regional France, and trains would be regularly travelling past. The woman asked me if the trains would be doing that all night, though I suspected that the answer was no (particularly since the last train from Rouen to Paris left Rouen at 8:20 in the evening). However, it started me thinking that Paris is probably the only city in the world where trains rumbling past your hotel at 10:30 at night could be considered romantic, or was it just that these rumbling trains reminded me that I happened to be in Paris, not that I really needed all that much of a reminder.