Korea guides
Each one answers a single decision and lists the Korean-language pages the prices and rules came from, with the date I last checked them.

Incheon layover under 24 hours: the free tour that gets you out

Q-CODE for Korea: only if you passed through these 32 countries

Gyeongbokgung night opening: 300 gate tickets are for foreigners only

Gangnam robotaxi vs metered taxi: the flat fare wins past 1.6 km

Hangang Bus: 3,000 KRW one-way, and the Climate Card question

In Korea, day one of your 90-day stay is the day after arrival

Seoul palace pass vs single tickets: the 6,000 KRW rule

A card refusal over 5,000 KRW is worth reporting. Here's the payout.

Gimpo vs Incheon: pick Gimpo unless your flight lands after 11pm

K-ETA rejected or expired? Check the 2026 exemption list first

800 USD in goods or 10,000 USD in cash: when Korea customs cares

Missed the last AREX at Incheon? A night bus is still running

Flying Korean Air or Asiana? You need Incheon Terminal 2

K-ETA exemption in 2026 doesn't mean skipping the e-Arrival Card

Two weeks in Seoul: guesthouse wins on price, officetel is a lease

KTX vs bus to Busan: 54,400 KRW buys back two hours

Four subway rides a day is when Seoul's Climate Card beats T-money

How much Korea eSIM data you actually need per day

Incheon airport to Seoul AREX vs limousine bus vs taxi