Hwaseong is an 18th-century fortress wall that loops nearly six kilometres around the old centre of Suwon. Built between 1794 and 1796 by King Jeongjo to honour his father — who died after being locked in a rice chest by political rivals — it combines Korean, Chinese, and European fortification techniques in a way that was remarkably advanced for its time. The walls incorporate watchtowers, floodgates, command posts, and a beacon tower, all connected by a walkable parapet.
Walking the full circuit takes about two hours and offers views over Suwon's dense modern city contrasting with the restored gates and pavilions below. The Janganmun and Paldalmun gates are the most impressive sections. A small archery range near the northern stretch lets you try your hand with a traditional Korean bow for a few thousand won.
Hwaseong became a UNESCO World Heritage Site in 1997. Much of it was damaged during the Korean War and rebuilt using the detailed construction records kept in the Hwaseong Seongyeok Uigwe, an illustrated manual compiled during the original build — one of the reasons the reconstruction is considered unusually faithful.