1896-2018 Barmouth Viaduct, looking onwards towards Cader Idris. Constructed for the Welsh coast railway some 30 years before the photo was taken, the underwater ironwork became severely corroded not long after, and was extensively reinforced in 1902 whilst adding a swing bridge for passing vessels at the increasingly busy waterfront which explains its altered appearance between images. A flood culvert has replaced the railway arches in the foreground during its conversion from timber railway line to a modern, gravelled track that slightly alters the vantage point for photos but allows the bridge to remain operational to this day as part of the Cambrian coast rail link, allowing passengers to continue northwards towards Pwllheli.