South Korea
The island's signature dish is fermented skate strong enough to make grown eaters gasp.
The ferry from Mokpo takes hours on a good day and stays in port on bad ones. The island's proudest plate makes first-timers gag. Heuksando does not make things easy, which is the point.
Heuksando, the Black Mountain island of the south-western archipelago, pairs a 400-metre volcanic spine and switchback coast road with one of Korea's fiercest food traditions: hongeo, skate fermented until it breathes ammonia, served as samhap with boiled pork and old kimchi to carry the blow. Free-divers still work abalone from the rocks, the circular road links settlements, cliffs and protected slopes, and island transport gets confirmed before sailing because the harbour alone shows little of the scale.
Friends
Order the samhap together and let the bravest go first.
Solo
Stay a night rather than day-tripping; the return sailing needs weather margin.
Hongeo comes with a choice of fermentation level, from approachable to formidable.
Heuksan makgeolli is the pour locals use to wash the skate down.

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