The large 120km-long Adelaide Island is found to the north of Marguerite Bay and off the west coast of the Antarctic Peninsula. It is one of the southernmost islands, and one that you will only get the chance to visit on a Polar Circle cruise.

Discovered in 1832 under Biscoe's expedition and revisited by Jean-Baptiste Charcot's Antarctic expedition, the origin of the name of this island has not been firmly established. Some sources say Charcot named it for the Adelie penguin colony on its coast, whilst others report Biscoe as having named the island for Queen Adelaide of England.

Two research stations can be found on the island. The older Base T was closed in 1976, and operations moved to the newly-built Rothera Research Station, which the Chilean authorities still visit every year.

You may visit Adelaide Island on an Antarctic cruise crossing the Circle.