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Penguin Island
"The small 1.4 x 1.7 km Penguin Island is located off the SE coast of King George Island in Antarctica's Shetland Islands, west of the axis of the Bransfield Rift. The most prominent feature on Penguin Island is Deacon Peak, a basaltic scoria cone with a 350-m-wide well-preserved summit crater that forms the 180-m-high summit on the SW side of the island. A small plug of basaltic lava occupies the 75-m-deep crater. Petrel Crater, a 300-m-wide maar, is located near the east coast. The formation of Deacon Peak scoria cone was dated by lichenometry at about 300 years ago, and the younger Petrel Crater maar was dated at about 100 years (Birkenmajer 1979). Some of the historical reports of fumarolic activity on nearby Bridgeman Island are attributed to the more youthful Penguin Island."  -Smithsonian Volcano Archive
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