South Georgia is an isolated, crescent-shaped sub-Antarctic island in the South Atlantic Ocean, roughly 1,300 kilometres southeast of the Falkland Islands. Administered as a British Overseas Territory, it has no permanent human population and is over 50% permanently covered by massive glacial ice fields. Bypassed entirely by commercial transport infrastructure, the island is heavily protected as a marine sanctuary, sustaining the densest and most monumental concentration of seabirds and marine mammals on Earth.