Ouse Valley Viaduct in West Sussex Travel Guide. Explore the stunning Ouse Valley Viaduct in West Sussex with our comprehensive travel guide! This iconic piece of Victorian engineering spans across the picturesque River Ouse and is a must-see attraction in England. Guide includes information on how to get to the viaduct, the best viewpoints to take breathtaking photos, and nearby walking trails, add the Ouse Valley Viaduct to your travel bucket list today!