South sea recreation area includes Tongpanyu, Hujingyu, Wangan Township and Cimei Township. Tongpanyu and Hujingyu are both known for their abundant geological features; the entire Tongpanyu is surrounded by columnar basalts of clear lines, the columnar joints is the most enriched in Penghu, and has long been known as the "Yellowstone Park of Penghu".
Wangan Township used to be known as "Bajhao", "jhao" in Taiwanese means "collective", which is the collection of eight islands. Since Wangan Island houses a harbor with a seabed composed by a mixture of sand beach and mud, in the early days, in addition to coastal fishery and intertidal zone fishing, local residents used to round up catches with a drag net, which sounded like "wangan", hence the name "Wangan".
Cimeiyu is the fifth largest island in Penghu, situated at the south end of Penghu islands, and a lot of prodigies of the natural terrain were preserved on the island. During 1662-1722, Cimei Island was called "Nanyu", later on "Nandayu", which was later changed again to "Dayu" toward the end of Ch’ing Dynasty, and the name was used until after the Taiwan Restoration. In 1949, the fourth mayor of Penghu County, Mr. Liuo Yanfu, was touched by how the "seven beauties" were willing to die protecting their chastity, and changed the name officially to "Cimei" (seven beauties).