Rocky Valley is a deep wooded valley formed by the Trevillett River near Tintagel. The valley runs from Saint Nectan's Glen to the sea with the steep sides reaching nearly 70 feet (22 metres) high in places.
Located on the riverside is the derelict Trewethett Mill which was used for yarn production in the 18th century. On the rock face behind the old mill are two rock carvings of labyrinths. These are thought by some to be Bronze Age, although more recent studies suggest they were carved using metal tools less than 300 years ago.