Creswell Crags is a limestone gorge on the border between Derbyshire and Nottinghamshire, England near the villages of Creswell, Whitwell and Elmton. The cliffs of the ravine contain several caves that were occupied during the last ice age, between around 43,000 and 10,000 years ago. The caves contain occupation layers with evidence of flint tools from the Mousterian, proto-Solutrean, Creswellian and Maglemosian cultures. They were seasonally occupied by nomadic groups of people during the Upper Palaeolithic and Mesolithic periods. Evidence of Neolithic, Bronze Age, Roman and post-medieval activity has also been found there. The main phases of stone age occupation were at around 43,000 BC then in a period between 30,000 and 28,000 BC and then again around 10,000 BC.