The viaduct spanning the river Nidd at Knaresborough is 90ft high and 338ft long. It was built in 1851 to carry Victorian rail traffic over the Nidd Gorge. The viaduct viewed from the castle grounds at the top of the cliff provides a picture box scene over the river and walkways. Make your way down to the river bank to take the picturesque riverside walk under the viaduct and along the banks of the Nidd to see houses built into the cliff side, spend time in one of the waterside café’s and take a boat trip before climbing Gallons steps or Water Bag Bank up to the marketplace. Parking is also available at either end of the riverside walk if you wish to avoid the steep climb too and from the town centre.