Hwaseomun Gate is the western gate of Hwaseong Fortress, a Treasure. Over the stone <i>mujigae</i> (rainbow) door is a single-story tower gate. Hwaseomun Gate's <i>ongseong</i> (defensive gate) forms a crecent shape, with one side of the ongseong remaining open.
Source: Korea Tourism Organization official English tourism database. Opening hours and details can change — check the official website before visiting.