We've all heard about Biggin Hill and its role in the Battle of Britain in 1940, so why not visit the Biggin Hill Heritage Hangar and see a huge collection of Spitfires - you can even sit in one, or watch restoration work being carried out.
Chislehurst Caves is only a 15-minute drive from the Crown Inn. There are "miles of mystery and history beneath your feet" so why not take a guided tour under ground...
Keston Common is registered as a Site of Special Scientific Interest (SSSI) and has Ancient Scheduled Monument (SAM) status. More recently, the area has been designated as a Local Nature Reserve (LNR) - Charles Darwin once studied the plants and animals here.