Passport? Good.

Thailand

Everyday basics

The numbers that matter here are not the ones from home.

Diagram: the utility certifies the supply, the building's own pipework is the unknown, so drinking water comes bottled

Can you drink the tap water?

The Bangkok utility certifies its supply as safe and drinkable. What that certification cannot cover is the building you are standing in — or anywhere outside its three provinces.

Metropolitan Waterworks Authority — Annual water quality report
Diagram: 191 emergency, 1669 ambulance, 1155 Tourist Police

What number do I call in an emergency?

191 is the general emergency line and 1669 gets an ambulance. As a visitor, the number to actually memorise is 1155 — the Tourist Police.

Royal Thai Government — Emergency contact numbers
Diagram: a Thai socket takes flat and round pins alike, but the supply is 220 volts

Do I need a plug adapter here?

Your plug probably fits — Thai sockets take flat American pins and round European ones alike. That is the trap, because the supply is 220 volts: fitting and working are two different questions.

Tourism Authority of Thailand — Electricity
Visitors at the Grand Palace in Bangkok

What do I wear to visit temples and the Grand Palace?

Shoulders and knees covered, nothing sheer or tight. The Grand Palace publishes its banned list and enforces it at the gate.

The Grand Palace — Practical information
Diagram: e-cigarettes are illegal here — do not bring the device at all

Can I bring my vape to Thailand?

No. E-cigarettes have been illegal here since 2014 — importing one can mean up to ten years' imprisonment, and using one can mean arrest. Leave it at home entirely.

Royal Thai Government — E-cigarettes are illegal in Thailand
Diagram: the head is the high and sacred end of a person, the feet the low one

What should I be careful not to do?

Three things carry real weight: never insult nation, religion or monarchy; the head is high and sacred; the feet are low and rude. Most of the rest follows from those.

Royal Thai Government — Do's and Don'ts in Thailand

Sort the practical stuff before you fly.

eSIMs, rail passes, and airport transfers — the things worth booking before you land.