The Grand Canyon became a fully protected US National Park in 1919. The Perth Canyon, off the coast of Fremantle, has barely been heard of, though at 1.5 kilometres deep, it rivals its famous Arizonan cousin.
You can’t visit the Perth Canyon in a campervan, but it is extremely popular with recreational fishermen. It is also popular with pygmy blue whales, which is why the Environment Minister, Tony Burke, proudly named it this week a key area to be covered by Australia’s massive new network of marine reserves.
Read more: http://www.smh.com.au/national/creatures-caught-in-oceanic-battle-20120615-20fbk.html#ixzz1xvPxi44o