Portrait of a Karo tribesman with facial decoration in chalk imitating the spotted plumage of the guinea fowl, Lower Omo Valley, Ethiopia, Africa

Portrait of a Karo tribesman with facial decoration in chalk imitating the spotted plumage of the guinea fowl, Lower Omo Valley, Ethiopia, Africa

Caucasian girl drawing with chalk on patio bricks

Caucasian girl drawing with chalk on patio bricks

Sheikh Zayed Grand Mosque

Street artist painting with chalk at Mercato Nuevo, Florence, Tuscany, Italy, Europe

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

Portrait painter at the promenade of Paphos, Southern Cyprus, Greek Cyprus, Southern Europe

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

Pedestrian tunnel with chalk drawings on the ground, painted by children, disused Suedbahnhof railway station, Krefeld, North Rhine-Westphalia, Germany, Europe

Pedestrian tunnel with chalk drawings on the ground, painted by children, disused Suedbahnhof railway station, Krefeld, North Rhine-Westphalia, Germany, Europe

Pedestrian tunnel with chalk drawings on the ground, painted by children, disused Suedbahnhof railway station, Krefeld, North Rhine-Westphalia, Germany, Europe