The Zig Zag Railway is a historic railway located in the Blue Mountains of New South Wales, Australia. It was originally built in the 1860s to navigate the steep terrain, allowing trains to travel between the towns of Lithgow and Wellington. The railway features a unique zigzag design, where trains change direction at specific points to manage the steep gradients. Today, the Zig Zag Railway operates as a heritage railway, offering scenic rides through the picturesque landscape. Visitors can enjoy the experience of traveling on vintage steam locomotives while learning about the railway's history and significance in Australian transportation.