Which Wiltshire hill is the largest artificial hill in Europe?
Silbury Hill of the flora on the differently-facing slopes of the hill. Silbury Hill Silbury Hill is a prehistoric artificial chalk mound near Avebury in the English county of Wiltshire. It is part of the Stonehenge, Avebury and Associated Sites UNESCO World Heritage Site. At high,<ref name="Historic England/English Heritage"></ref> it is the tallest prehistoric man-made mound in Europe and one of the largest in the world; similar in size to some of the smaller Egyptian pyramids of the Giza Necropolis. Silbury Hill is part of the complex of Neolithic monuments around Avebury, which includes the Avebury Ring and West Kennet Long Barrow.
Tan Hill, Wiltshire Tan Hill, Wiltshire Tan Hill () is a hill which lies just to the north of the village of Allington in the parish of All Cannings, Wiltshire, England. Its summit is 294 metres (965 ft) above sea level and is the second highest point of the North Wessex Downs AONB hill range (the adjacent Milk Hill is 295 m high) and of Wiltshire. It is also the third highest point between Bristol and London. To the south, its adjoins Clifford's Hill. On 23 August 2009, the BBC programme "Countryfile" featured an item on analysis by Ordnance Survey to determine whether