The group consists of two main islands, Prince Edward Island and Marion Island. They are separated by 22 km and are of volcanic origin with a number of outliers. The two islands cover 317 km² with the highest elevation, State President Swart Peak, located on Marion Island. The group was first sighted in 1663 with the first landing, by sealers, in 1799. A scientific station was established in 1947 and has been occupied permanently since. The Prince Edward Islands are a state territory of the Republic of South Africa. This category contains Internet sites that are about or located on the Marion and Prince Edward Islands.