"O" is for Ochre

Ochre is a natural earth pigment that has been used by painters since prehistoric times. Colours range from yellow and orange to red and deep rusty brown. The village of Roussillon in Provence has the world's largest known deposit of ochre.

Ochre Cliff, Roussillon

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"O" is for Oxford Street
"O" is for Obelisk
"O" is for Olive