Creswell Crags in Bassetlaw

You're standing in Creswell Crags, a narrow limestone gorge right on the border between Derbyshire and Nottinghamshire. Take a look at the cliffs around you. See those dark openings? They're caves. Neanderthals once lived in them, and later modern humans did too. That was during the last Ice Age, somewhere between sixty thousand and ten thousand years ago.