The Blowing Stone is a perforated sarsen at grid reference in Kingston Lisle, Oxfordshire (Berkshire until 1974). The stone is in a garden at the foot of Blowingstone Hill just south of the Icknield Way (B4507), about miles (7 km) west of Wantage and about miles (2.4 km) east of White Horse Hill.
The stone is capable of producing a booming sound if someone with the required skill blows into one of the holes the right way. According to legend it could be heard atop White Horse Hill, where 19th-century antiquarians thought King Alfred the Great's Saxon troops had camped, and that this was how Alfred summoned them for the Battle of Ashdown against the Danes in AD 871.
It is also one of the "sacred stones" mentioned in William Horwood's Duncton Wood, the first book in his fantasy fiction series about a group of moles.