Identifiernot specifiedPhotographernot specifiedDescriptionThe Thornleigh Zig Zag Railway, an almost forgotten freight line which ran for less than 10 years in the late 1800s, has an elusive and fascinating story. The third and final Zig Zag in NSW, helped build the Great Northern Railway from Sydney to Newcastle, and along with the Thornleigh Quarry played a vital role in connecting towns and people across the State.