The Riiser-Larsen Peninsula (Norwegian: Riiser-Larsenhalvøya) is a large peninsula which forms the western portal to Lützow-Holm Bay and marks the separation of the Princess Ragnhild and Prince Harald Coasts. It was named after Captain Hjalmar Riiser-Larsen who discovered the peninsula in a flight from the Norvegia on 21 February 21 1931.[1]