Odongdo is a small island floating just off Yeosu, connected to the mainland by a 768-meter breakwater — you literally walk to the island. That walkway made the list of Korea's 100 Most Beautiful Roads, and the 15-minute stroll with the sea on both sides is an opening act that rivals the main show. Cars can't enter (pets aren't allowed either), and if the walk feels like a chore, the camellia train shuttles you from the entrance for about ₩1,000 one way.
The island's headliner is unquestionably the camellia. Over 3,000 trees form a forest that starts budding as early as November, keeps blooming into April, and peaks from late February through March. Unlike most flowers, camellias drop whole while still vivid — so at peak season the red blooms carpet both the branches above and the ground below, turning the forest paths into a literal red carpet. It's one of the few places in Korea where you get a first-rate camellia spectacle without flying to Jeju.
There's plenty beyond the flowers. Pass through a bamboo-grass tunnel so dense it blots out the sky and you reach the white Odongdo Lighthouse at the island's crown, whose observation deck unrolls a panorama of Yeosu's harbor and open sea. Down along the shore, rock formations like Dragon Cave and the wind-carved gorge line up one after another, and on rough days the spray exploding against the cliffs is a show of its own. The trail network totals about 2.5km — even a leisurely full loop fits comfortably in 60 to 90 minutes.
Access is painless. From Yeosu Expo Station (a KTX stop) it's five minutes by car and barely longer by city bus; drivers can park at the Odongdo public lot (paid) and reach the breakwater in a 2–3 minute walk. The Yeosu Maritime Cable Car pairs perfectly — it floats you over the island and the bay for an aerial view — and rolling into the pocha street for Yeosu's famous night sea completes the day. The island itself never closes, but the camellia train runs roughly 09:30–17:00 with a lunch break, so time it accordingly.