A labyrinth of dark, hand-carved passages that date back many centuries, the Chislehurst Caves are an unusual London landmark. Some claim they were used by Druids or ancient Romans, though their lineage is unclear. What is known is that they served as flint and chalk mines for centuries. The caves were also used for ammunition storage in World War I and as air-raid shelters in World War II.
All visits are by tour, which do not need to be reserved in advance. Torchlight tours offer an atmospheric way to discover the landmark, with small groups being provided their own oil lamps to carry. The Chislehurst Caves are included in the London Pass, and it’s also easy to plan an independent visit.