The Ribiana Sand Sea is located in Africa's Libyan Desert. The three sandseas contain dunes up to 110m in height and cover ~25% of the Libyan Desert. The dunes were created by the wind.
... & Eton Central station[?]
Essex Road station[?]
Drayton Park station[?]
References
J. E. Connor, London's Disused Underground Stations, Capital ...