Chislehurst Caves is a popular tourist attraction located in Chislehurst, Kent, England. The caves are a labyrinth of tunnels and passageways that were dug out by hand over a period of 8,000 years, initially as a source of chalk and flint for making fires and tools. The caves stretch for 22 miles and feature a series of narrow tunnels, some of which are only a few inches high. Visitors can take a guided tour of the caves, which includes a 45-minute walk through the tunnels, learning about the history and geology of the site. The caves also feature a number of exhibits, including a collection of fossils and a display on the history of the caves.