Explore a 22 mile system of caves in the suburbs

It's a 22 mile system of tunnels dug out of the ground, only 20 minutes from London Bridge, inside the M25, and it's open to the public five days a week, fifty weeks a year. Where is it?

Chislehurst Caves were dug over the course of nearly eight hundred years between the 13th and 19th Centuries, as chalk and flint mines.

Since then, they've been used as an ammunition depot during the First World War, an air raid shelter during the Second World War, a music venue used by Status Quo, Jimi Hendrix, Pink Floyd, Led Zeppelin, The Rolling Stones and David Bowie, a mushroom factory, the set for a 70s Doctor Who episode, to film recent BBC series Merlin and to make a Cradle of Filth video.

The caves are open Wednesday - Sunday and 45 min tours start hourly between 10am and 4pm, and cost £5.

Regular trains run to Chislehurst from Charing Cross and London Bridge, and it's a short walk from there. For more information visit the website.