Jeju in : Boat-traffic eyes at Seogwipo

A volcanic Korean island of haenyeo coasts: Munseom, Beomseom, Udo, and a 2016 UNESCO listing for women divers who work on one breath. Jeju is a volcanic island south of the Korean Peninsula, listed as a UNESCO World Heritage volcanic site in 2007. Its water story is Seogwipo's islets (Munseom, Beomseom, Seopseom), the snorkel beaches of Udo, and the haenyeo (women divers) whose breath-hold work was inscribed as UNESCO intangible heritage in 2016.

Wow factor is high for a temperate-to-subtropical island, a step below the equatorial places in this atlas. Seasonality is high: winter winds and a short warm-water window. Accessibility is middling-high: domestic flights and a few shore snorkels, plus boat dives that wait on swell. Risk is moderate: current, cold, and boat traffic, not wreck-penetration scores.

This chapter is a place atlas, not a haenyeo costume, not a certifying agency, and not a live briefing. Jeju marine park rules, the day's wind and a working dive-ground override any sentence here. Destination pages are season and access notes — not a booking engine. Visa, park fees and live weather beat brochure months.