The Sikorsky Glacier flows past the south of the peninsula to enter Duarte Cove.

The Cierva Point and offshore islands Important Bird Area is on the northwest extremity of the peninsula.

An ice-covered saddle of elevation 1,170 metres (3,840 ft)[4] extending 1.6 kilometres (0.99 mi) in the northwest foothills of the Detroit Plateau.

It is part of the glacial divide between Wright Ice Piedmont to the east and Breguet Glacier to the west.

Cove lying 6 nautical miles (11 km; 6.9 mi) southeast of Cape Sterneck in Hughes Bay.

Named by the UK-APC in 1960 for Juan de la Cierva (1895-1936), Spanish designer of the autogiro, the first successful rotating wing aircraft in 1923.