Japan's expressway tolls are among the highest anywhere, and one licence technicality stops drivers from several European countries at the rental desk.
Thailand's best driving is in the north, and the loop out of Chiang Mai is 1,864 curves that most visitors attempt on a motorbike they shouldn't be riding.
The single most expensive mistake in Italy is driving into a restricted zone your GPS routed you through — and the fines arrive months later.
The advertised European rental rate rarely survives contact with the desk, and taking the car across a border can void the insurance entirely.
Three unglamorous decisions — which card you pay with, how you get data, and what your insurance excludes — quietly cost or save hundreds on every trip.
A lot of widely repeated travel tricks were true a decade ago and are now either useless or actively expensive.
Getting from Charles de Gaulle into Paris is the trip's first real decision, and the taxi flat fare is regulated in a way most arrivals don't know.
London has six airports and a fare system that quietly gives you the cheapest price automatically — provided you use it the right way.
Four booking choices determine most of what a first trip costs and how much of it you spend in transit — and they are all made before you leave.
The hard part of a first trip abroad is not the flying — it's the passport validity rules, card blocks and insurance gaps that surface at the worst moment.
Most long-flight advice is comfort theatre. Three things genuinely affect how you feel on landing, and two of them start before you board.
The gap between economy and premium economy is often larger in practice than the gap between premium economy and business, and it costs a fraction as much.
Redeeming miles for a business seat can be extraordinary value or a waste of a year's earning, and the difference is almost entirely which programme you book through.
Most airlines now auction their unsold premium seats, and the bidding systems have quirks that decide whether a low offer wins or gets ignored.
Upgrades are allocated by a priority list you can see the shape of, and dressing smartly is nowhere on it.