The sequence of limestones in Cressbrook Dale make it an important geological site. The layers were deposited in a warm shallow sea in the Brigantian stage of the Carboniferous period. The Carboniferous Limestone contains important fossils. Several layers of volcanic rock show that volcanoes were once active in Derbyshire. Peter's Stone is the prominent limestone knoll at the northern end of the valley. It used to be called Gibbet Rock where the last gallows in the county once stood. The gibbet was an iron cage holding the dead bodies of executed criminals as a deterrent to others. One of the last cases of gibbeting was of Anthony Lingard from Tideswell in 1815. He was convicted and executed in Derby for killing Hannah Oliver, the toll-keeper at Wardlow Mires, for a pair of red boots. His corpse was hung in chains on Peter’s Stone. High on the cliff above Ravensdale Cottages is Ravencliffe Cave, which is deep. In the early 20th century, Stone Age, Bronze Age and Roman artefacts were recovered from the cave including polished stone axes, an arrowhead, pottery fragments, beads and bronze brooches as well as human and animal remains. Ravensdale Cliff has numerous low- to middle-grade rock climbing routes up to long on the main buttress. The cliffs of Water-cum-Jolly are an accessible and extensive area for climbers with over 400 routes.
Industry
The large lead mining area at Tansley Dale, towards the head of the valley, is a protected Scheduled Monument. The visible remains are ruined stone walls and earthworks. Ravensdale Cottages in the middle of the valley are two terraces of lead miners' cottages from 1823. They are Grade II listed buildings. Cressbrook Mill dominates the view at the foot of the valley by the River Wye. The cotton mill was built in 1814–15 by William Newton on behalf on J L Philips. It replaced the original mill built in 1779 by Sir Richard Arkwright, which burnt down in 1785. The clock on the pediment and the octagonal cupola were added in 1837 to commemorate the Queen Victoria's coronation. The mill closed in 1965. It is a Grade II* listed building.
Access
There is a easy-going footpath along the length of the valley floor. The Monsal Trail bridleway runs along the Wye valley at the southern end of Cressbrook Dale. There is access into the dale from both ends, as well as two footpaths from Litton village into the west side of the valley. There is some roadside parking in Upperdale near the southern foot of the dale.