The Montebello Islands, also known as the Monte Bello Islands, are an archipelago of around 174 small islands (about 92 of which are named) lying 20 kilometres (12 mi) north of Barrow Island and 130 kilometres (81 mi) off the Pilbara coast of north-western Australia. Montebello is Spanish or Italian for “beautiful mountain”. The islands form a conservation park administered by the Western Australian Department of Environment and Conservation, and it is likely that the shallow waters around them will become a marine conservation reserve. The islands were the site of three nuclear weapons tests by the British military in the 1950s.