The right moment to leave is usually before a place runs out

A stay has a shape, and the shape repeats

The opening days go on orientation, which is unavoidable and largely invisible while it is happening. Then comes a stretch where the effort of navigation drops away and attention is finally free for the place itself, and this middle period is the reason for staying anywhere longer than a weekend.

What follows is less discussed. After some number of days, which varies enormously by person and by place, the return on another day starts to fall, not because the town has been exhausted but because your capacity to register new things about it has temporarily run down.

The curve isn’t a rule and it does not have a fixed length. A large city with several distinct districts can sustain the productive middle for weeks; a small town with one street and one view may be through it in three days, and neither of those facts is a judgement about the place.

The signal is not boredom, it is having stopped noticing

Boredom is a poor indicator because it arrives for many reasons, including tiredness, bad weather and a run of disappointing meals. The more reliable sign is that you walk down a street and register nothing at all, when the same street on the second day produced half a dozen small observations.

A second sign is that your day has become a routine rather than a sequence of decisions. Routine is comfortable and it is exactly what makes a long stay sustainable, but when the routine is the whole content of the day, the place has stopped supplying anything the routine could not supply somewhere else.

A third is that you start photographing less, or start photographing the same things again. That isn’t a moral failing. It is an accurate report from your attention that the novelty has been processed and the mind has moved the surroundings into the background where it keeps everything familiar.

Rest is a legitimate reason to stay, and it is a different reason

None of this argues for moving on the moment the observations thin out. Travelling is tiring in a way that is easy to underestimate, and a few days in a place where you already know the shop, the bus and the good bench is a genuinely restorative use of a trip.

The distinction worth keeping is between staying because the place is still giving you something and staying because you are recovering. Both are fine. Confusing them is what produces the stay that drifts on for a week while its occupant feels vaguely guilty and vaguely flat about it.

Naming which one you are doing changes the choices inside the day. A rest stretch does not need an itinerary and should not have one; a productive stretch deserves the earlier start and the district you have not walked yet, and treating either as the other wastes it.

Bookings decide this for you, and they were made by someone who knew less

The person who booked six nights in a town was working with photographs and an hour of reading. The person standing in the town on the third evening has considerably better information, and there is no reason the earlier one should outrank the later one on every occasion.

The practical answer is to hold the shape of a trip loosely where the cost of doing so is low. Refundable accommodation, a rail pass rather than a chain of fixed departures, and a habit of booking a few days ahead rather than a whole month all buy the option of responding to what you find.

That flexibility is not free, and pretending otherwise is dishonest. In high season, in small places, and on routes with one service a day, the choice is often between an early booking and no bed at all, and the trade is then plainly worth making.

Leaving with something unfinished is not a failure

There is a common instinct to stay until a place has been completed, as though a town were a list. It is worth resisting, because the completed version rarely exists and the pursuit of it turns the last days of a stay into an administrative exercise conducted against a checklist.

Leaving early has one underrated effect: it leaves the place attached to a reason to return. A town you left with a museum unvisited and a walk untaken keeps a small hold on your attention, and that is a far better souvenir than the sense of having got through it.

And the alternative is genuinely costly. Days spent somewhere that has stopped registering are days not spent anywhere else, which is the only resource on a trip that cannot be topped up later. Going while it is still good is not sentimentality; it is the best use of a finite number of mornings.