I like to go “flying” occasionally with Google Earth; it is how my husband and I discovered the Scilly Isles (I’ll tell you more about that sometime), and how I’ve found several hill figures across the UK; here’s one of my favourites:
Dating from the late Bronze Age (1000–700 BC), the Uffington White Horse (in Oxfordshire, nearest the town of Uffington) is a stylized hill figure of 110 metres long, created by deep trenches filled with crushed white chalk. It is protected and maintained by the National Trust as a Scheduled Ancient Monument (if it is not cleaned regularly it would disappear rapidly, the chalk being washed away by rain or the trenches filling in with local vegetation).
These coins pictured are Iron Age Celtic coins (the currency of the pre-Roman population), and the designs are comparable to the White Horse, supporting the early dating (it was thought for some time that the figure could have been constructed as late as the Iron Age, 800 BC–AD 100, but samples from silt of the figure supported the earlier date). The White Horse is by far the oldest such figure in Britain, but certainly not the only one; ancient figures are scattered throughout the British Isles, though Wiltshire alone has at least eight. When you have a few minutes to spare, take a Google Earth flight over the UK, and see if you can spot any other figures!