It was one of the 12 dondae (small defensive forts) built under the order of King Sukjong in 1679.
The site played a primary role in the 1866 Byeong-in Yangyo conflict when French forces attempted to capture Ganghwa.
The name 'Gapgot' originated from a legend involving King Gojong, who supposedly remarked that the area was a 'hook' (gap) that caught the enemy.
Its location provided a clear line of sight for firing cannons at incoming vessels in the narrow Yeomha Strait.
The site includes a preserved iron-clad warship replica and traditional Joseon-era naval weaponry displays.
Gapgotdondae Outpost is a historical coastal defense fort located on Ganghwa Island, overlooking the 염하 (Yeomha) channel. Constructed during the Joseon Dynasty, it served as a crucial strategic point to monitor and defend against maritime incursions toward the capital. The site features stone walls, restored ramparts, and artillery batteries positioned to command the narrow waterway. It was notably involved in the 1866 French campaign against Korea (Byeong-in Yangyo) and served as a site of intense conflict. Visitors can walk along the perimeter walls which provide unobstructed views across the strait toward Gimpo. The site was historically part of the 12 total outposts (dondae) established by the Joseon government to fortify the island's coastline. Artifacts and historical remnants are maintained within the grounds to illustrate the military architecture of the era. The site is recognized for its role in protecting the gateway to Seoul via the Han River estuary.
The elevated stone bastion facing the Yeomha channel, capturing both the wall ramparts and the water.
Bring a windbreaker even in mild weather, as the coastal location is prone to strong gusts.
Combine your visit with the Ganghwa History Museum located immediately adjacent to the fort.
Walk the full length of the outer wall to see the varying angles of the artillery ports.
Do not attempt to climb or sit on the historical stone railings as the mortar is fragile.
None.
Maintain a respectful tone as the site is considered a memorial to historical defense efforts.
