Castle Rock (62°48′S 61°34′W) is a conspicuous rock, 175 metres (570 ft) high, lying 2 miles (3 km) off the west side of Snow Island, in the South Shetland Islands. This descriptive name dates back to 1822 and is now established in international usage.
References
Castle Rock (South Shetland Islands) Wikipedia(Text) CC BY-SA