Situated in an area of the low, rocky Windmill Islands and peninsulas, Casey is perched on the edge of the massive Antarctic ice cap. With more than more than 50 islands in the group, the Windmill Islands are home to tens of thousands of birds, including Adélie penguins, giant petrels, skuas and snow petrels.
Depending on weather conditions, ships take between seven and ten days to reach Casey, and the A319 aircraft takes just under five hours.
To the east of Casey, rises Law Dome, a small and almost circular ice cap 200 kilometres in diameter. Law Dome, 1395 metres high and 110 kilometres inland, is an immense ice cap that was the site of a drilling project that finally reached bedrock in 1993. The ice was measured to be 1200 m thick.
Casey is also the site of large moss beds, recognised as among the most significant vegetated areas on the continent.
An Antarctic Meteorological Centre, established at Casey in 1993 to provide high resolution satellite imagery to the World Meteorological Centre in Melbourne, is now becoming the focus for weather and climate research in this vital part of the global weather system.