📜 World's oldest surviving single-arch railway bridge, a significant part of England's industrial heritage. Built in 1725–26 by stonemason Ralph Wood. # Why Go 🌉 Historic architectural marvel🚶 Pedestrian footbridge with scenic walking paths🏞️ Explore a wooded gorge with Causey Burn flowing beneath👂 Experience unique acoustics under the archway🧗 Popular spot for local rock climbing🚂 Enjoy vintage steam train rides on the nearby Tanfield Railway # Why Avoid ⚠️ Watch out for steep unfenced drops🌿 Viewpoint can be overgrown, including the step-free viewpoint. # 🅿️ Parking Free parking available at Causey Arch Picnic Area. Paths lead from the car park, with steps to view the arch from above and below. # Cost 💰 Free to visit