The closest cave to Castleton is Peak Cavern, with an impressive entrance situated at the foot of the hill where the castle stands. For three centuries, until 1974, ropemakers lived here, their houses built at the entrance leading to the cavern. There are still lines of black soot from their chimneys.
Address :Hope Valley
Apr-Oct: 10am-4pm (every hr); Nov-Mar: weekends and school hols 10am-5pm (every hr), Mon-Fri except school hols: telephone for timetable