Aerial image of West Kennet Long Barrow, a Neolithic tomb or barrow, on a prominent chalk ridge, near Silbury Hill, Avebury, Wiltshire, England, United Kingdom, Europe

Aerial image of Westbury chalk quarry, with Westbury White Horse and Bratton Camp Hill Fort in background, Wiltshire, England, United Kingdom, Europe

Sunrise at the White Horse, Uffington, Oxfordshire, England, United Kingdom, Europe

A farmer ploughing chalk hills on the East Yorkshire Wolds, Yorkshire, England, United Kingdom, Europe

Scenic view of a dry grassland with scattered bushes under a blue sky with fluffy clouds, with a hint of a town in the distance, chalk cliffs on the Sussex coast, East Sussex, England, United Kingdom, Europe

Hay bales on rolling chalk fields near the village of Fridaythorpe, on the East Yorkshire Wolds, Yorkshire, England, United Kingdom, Europe

Cherhill White Horse, cut into chalk downland in 1780, with rape crop (Brassica napus) flowering in the foreground, Wiltshire, England, United Kingdom, Europe

Corn fields and rolling chalk hills in mid-summer sunshine near Fridaythorpe on the East Yorkshire Wolds, Yorkshire, England, United Kingdom, Europe

Long Man of Wilmington chalk figure, Wilmington, East Sussex, England, United Kingdom, Europe

Soccer field and a German national flag, chalk drawing, painted on the floor by children, Germany, Europe

Soccer field and a German national flag, chalk drawing, painted on the floor by children, Germany, Europe

Baseball home plate

Baseball home plate

Baseball home plate