The Welsh Highland Railway is a narrow-gauge heritage railway located in Wales. It runs between Caernarfon and Porthmadog, covering a distance of approximately 25 miles. The railway offers scenic views of the Snowdonia National Park and is popular among tourists and railway enthusiasts. Originally opened in the early 20th century, the railway was closed in the 1960s but was later restored and reopened in stages. Today, it operates steam and diesel locomotives, providing a nostalgic experience for visitors. The Welsh Highland Railway is part of the larger Ffestiniog Railway network, enhancing its historical significance.