Songido Island, the second largest island in Nagwol-myeon District, is home to Korea's one and only white pebble beach, several different species of trees, sea caves and joints created by coastal erosion. Moreover, it features various leisure activities such as fishing, camping and swimming.

Chilsando, an affiliated islet of the Songido, is home to a yellow-billed egret, designated as Natural Monument No. 361, and a black-tailed gull. The sound of the black-tailed gull was selected as the most beautiful sound that a living creature can make in the competition sponsored by the Ministry of Environment in 1999. Moreover, the islet has been named as the most beautiful island in the nation by the Ministry of Maritime Affairs and Fisheries in 2003.