Martello Tower is a rock 10 metres (33 ft) high, lying in King George Bay 2 nautical miles (4 km) north-north-west of Lions Rump, in the South Shetland Islands of Antarctica. It was charted in 1937 by Discovery Investigations personnel on the Discovery II, who named it after the fortified towers of that name.

 This article incorporates public domain material from "Martello Tower". Geographic Names Information System. United States Geological Survey. 62°6′S 58°8′W / 62.100°S 58.133°W / -62.100; -58.133