Una Peaks, formerly known as Cape Renard Towers, are two towers of basalt, each topped by a cap of ice, guarding the northern entrance to the Lemaire Channel on the Antarctic Peninsula. With the highest summit at , The formation has been long colloquially known as "Una's Tits". The peaks appear on a British Antarctic Territory stamp although they are not identified as such. The individual towers are referred to as "buttresses".
Una Spivey was the name of a secretary in the governor's office in Stanley, Falkland Islands who was working for what is now the British Antarctic Survey. The tallest tower has only been summited once; this was by a German team in 1999 (Kurt Albert, Stefan Glowacz, Hans Martin Götz, Gerhard Heidorn, Holger Heuber and Jürgen Knappe).