Incheon Jotang

A massive seawater spa that works perfectly before or after a flight. They pump mineral-rich water from deep underground rock formations and heat it up, so it feels noticeably different from a regular tap-water bath. Spread across four floors, there are plenty of pools, and the top floor has an open-air pool with a wide view of the West Sea. It runs 24 hours, so you can stop by before a dawn flight or after a late-night landing. The jjimjilbang area is spacious enough to use as a transit rest stop. Because the place is huge, it rarely feels packed even on weekends. The address is 30 Yongyuseo-ro, Jung-gu, Incheon, out on Yeongjongdo. The airport is close; central Incheon and downtown Seoul are not. Treat it as something you fold into a flight schedule rather than a destination you travel out to on its own. Pricing and hours need checking on site.

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