Loudongyan — Loudongyan is the tallest among a series of small coral reef rocks. It is pierced through the center forming a round hole, through which sea currents pass. From a distance, it resembles an archway and is a famous landmark of Green Island.

Loudongyan. Loudongyan is the tallest among a series of small coral reef rocks. It is pierced through the center forming a round hole, through which sea currents pass. From a distance, it resembles an archway and is a famous landmark of Green Island. Loudongyan is the tallest among a series of small coral reef rocks. It is pierced through the center forming a round hole, through which sea currents pass. From a distance, it resembles an archway and is a famous geological feature of Green Island. Address: 臺東縣綠島鄉綠島東北角海岸外約300公尺處 Hours: 00:00–23:59 Taitung