Neidpath Castle is a massive 14th century stone four storey L-plan tower house, founded by the de Hay family. Built against the steep banks of the River Tweed, the main block with its rounded corners, originally had three vaulted rooms. Extensive alterations to the tower in 17th century, removed the top vault and divided the middle vault, to fit in extra floors. In the small courtyard are a range of buildings from the 16th to 18th century. The castle, which is reputedly haunted, is entered through the remains of an interesting gateway, with a round-headed arch. A mile east is Castle Hill and 4 miles south-west is Castlehill Tower.