From Wikipedia:

The Uffington White Horse is a highly stylised hill figure, 374 feet (110 m) long, cut out of the turf on the upper slopes of Uffington Castle, a largely Iron Age hill fort near The Ridgeway, in the civil parish of Uffington in the English county of Oxfordshire (formerly Berkshire). It is located some five miles (eight kilometres) south of the town of Faringdon and a similar distance west of the town of Wantage. Best views of the horse are obtained from the north, particularly from around the villages of Great Coxwell, Longcot and Fernham. The hill upon which the figure is drawn is called White Horse Hill and the hills immediately surrounding it, the White Horse Hills. The nearest settlements are Woolstone, Kingston Lisle, Knighton, Compton Beauchamp and Uffington.