Airport security is relaxed about supplements, with no quantity limit on tablets and no requirement to keep original bottles. The complications sit elsewhere: the 12 ounce powder threshold, liquid vitamins under the 3-1-1 rule, and destination countries that regulate melatonin and high dose vitamins as medicines.
Being able to wash clothes on the road is what makes a small bag possible, since a traveller who does laundry carries one week's wardrobe for a month. Five methods compared by effort and cost, where each one actually exists, how to dry clothes overnight and which fabrics make all of it easier.
Border control has become the least predictable part of a journey, with European waits stretching to hours since the biometric Entry/Exit System rolled out. Realistic timings by region, what actually speeds you up, why US connections need far more buffer than the published minimum, and how to plan the gap.
Amsterdam is small, flat and walkable, which makes it one of the few European capitals where a short visit is not a compromise. What two, three and four days each buy you, the one ticket that should decide your dates, and why the 2026 tax changes reward staying fewer nights.
Paris sights are genuinely spread out, and the metro journeys between them add up faster than the map suggests. How four days divide by neighbourhood rather than by attraction, what the Louvre now costs depending on your passport, and why Versailles deserves a fifth day.
Prague is compact enough that crowds rather than distance are the constraint, and the difference between a good visit and a frustrating one is mostly timing. What three days covers, why the castle takes longer than expected, and the exchange booth trap that costs visitors real money.
Florence is small enough to walk end to end, so the constraint is not distance but the time its two defining museums take. How three days break down, the late afternoon Uffizi ticket that changes the plan, and when Florence stops being a destination and becomes a base.
Barcelona is larger than visitors expect and the Gaudi sites are scattered across it, which is why four days works where three feels brisk. How the days divide by district, what the doubled 2026 tourist tax now costs per night, and why booking slots should come before booking flights.
Barcelona is safe in the way that matters most, since violent crime against visitors is rare. What it has instead is one of Europe's highest pickpocketing rates, concentrated in a small number of predictable places. Which areas need care, which do not, and the habits that remove most of the risk.
What the TSA and FAA actually allow when you fly with a lighter: which types clear the checkpoint, why torch and jet flame lighters are banned outright, when a fuelled lighter may go in the hold, and how the rules shift once you leave the United States.
