A small island at the crossroads of East Asia
Jangdo, off Jangjwa-ri in Wando, is small in size but central to the maritime history of Unified Silla. In 828, Jang Bogo established Cheonghaejin here. On the routes linking Silla, Tang China and Japan, the base served both maritime defense and trade.
Look for the shape of the earth
Rather than an imposing intact castle, the important clues are traces of fortification that follow the island's topography. Archaeological work has identified layers of rammed-earth construction, timber defenses along the shore, and the remains of wells and gateways. The Academy of Korean Studies explains that the site was designated a Historic Site in 1984 and investigated over several seasons from 1991 to 2001.
The crossing is part of the experience
In the past, the island could be approached on foot when the tide was out. Korea Tourism Organization notes that a pedestrian bridge, Jangdo Mokgyo, was installed in 2009, allowing access without relying on the low tide. On the crossing, consider how this small island commands the water routes around it. Follow posted paths and protect archaeological remains.
Before setting out
The site is around Jangdo Island off Jangjwa-ri, Wando-eup, Wando County, South Jeolla. This check did not establish the current opening schedule, closures, admission charges, public transport or parking rules. Check the Korea Tourism Organization guide and the latest Wando County notices before travelling. Do not rely on an unverified walking or driving time to other Jang Bogo-related sites.