The Gold Rush left behind thousands of mines that remain toxic to the environment. The mining sector needs to develop a national abandoned mine initiative to regain public trust. Tens of thousands of forgotten mines puncture Australia, some even dating back to the Gold Rush. Some of these abandoned mines have become toxic to the environment, eroding the public’s trust in miners and regulators. Unrehabilitated legacy mines number more than 50,000, including structures like shafts and tailing dams.