Udo Island is a small volcanic island fifteen minutes by ferry from Seongsan port on Jeju's east coast, famous for black-sand and coral-sand beaches, sea-view bicycle paths, and a working haenyeo (woman-diver) community. Most visitors rent an electric scooter or bicycle and complete the coastal loop in a half-day, stopping at Geommeolle Black Sand Beach, Seobinbaeksa coral beach, and the Udo Lighthouse hill for ocean views. Bring modest layered clothing for wind off the strait. Halal-friendly Jeju travellers should pack snacks — most island restaurants are not halal-certified, but vegan and seafood-only stops exist.
