Found on Ross Island, Mount Erebus is the southernmost active one of these in the world
These are vents coming from the ground in which heated gases 
and water... [DOC] [TLE] Erebus, Mount : Climbing, Hiking & Mountaineering : SummitPost [PAR] Nov 28, 1979 ... Mount Erebus is the southernmost active volcano on Earth and the second 
highest ...