Our list deliberately skips the obvious: no city appears twice, and every entry can be done in five days without a rental car.
What we know
Reporters spoke to officials, operators and analysts directly involved, and reviewed documents published this week. Figures quoted in this piece are the most recent available and will be updated as new data lands.
Travel well and you come home with questions, not photographs.
What happens next
Book the bed before the flight, travel midweek where you can, and leave one afternoon deliberately unplanned.
