Iksan Wanggungni Yujeok is a wide flat Baekje cultural heritage site believed to be the royal palace of King Mu of Baekje. It is listed as a UNESCO World Heritage Site, and at the entrance visitors can see the Wanggungni Ocheung Seoktap, National Treasure No. 289, along with traces of building sites, ponds, and drainage facilities. Walking the outdoor site after first looking around the Baekje Wanggung Museum takes about an hour in total, and the museum lends umbrellas for free. There are quite a lot of construction sections.