Linked from
The 15 pages that link to Antarctic Circle, each with the reason it gives.
Polar nightBroader topic: South of this latitude, at least one day each year has no sunrise.
Arctic CircleCompared with: It is the Arctic Circle’s counterpart in the Southern Hemisphere.
Midnight sunBroader topic: South of this latitude, the phenomenon occurs during austral summer.
Circumpolar starRelated: High southern latitudes make more of the southern sky’s stars circumpolar.
SolsticeRelated: The June solstice brings continuous darkness within the circle.
December solsticeRelated: Areas south of it can experience continuous daylight around this solstice.
Queen Maud LandRelated: Queen Maud Land lies south of this latitude circle.