Located 162 kilometres (101 mi) north-northeast of Sydney, at the mouth of the Hunter River, it is the predominant city within the Hunter Region. Famous for its coal, Newcastle is the largest coal exporting harbour in the world, exporting 159.9 million tonnes of coal in 2017. Beyond the city, the Hunter Region possesses large coal deposits. Geologically, the area is located in the central-eastern part of the Sydney basin.
https://en.wikipedia.org/wiki/Newcastle,_New_South_Wales