The mainland on New Lantea is the only known location of dry land on the planet. It is home to a Snake-like creature, the Rodneyana villosa, the Alien begonia and the Enchuri plant.
Lt. Colonel John Sheppard and Ronon Dex searched the mainland for the Enchuri plant. (SGA: "Tabula Rasa")
The captured Human-Wraith Hybrids were kept on the mainland during treatment. (SGA: "Search and Rescue", "The Seed", "Broken Ties")
Lt. Colonel John Sheppard escorted Dr. Parrish and Dr. Kiang to the mainland. (SGA: "Remnants")