Richard Starks and Miriam Murcutt were commissioned by "Geographical," the magazine of the Royal Geographical Society in London to explore a river that joins two great South American river systems, the Orinoco and the Amazon, by apparently flowing uphill over the watershed that divides them.

Which way does the Orinoco river flow?

After its bifurcation in the Casiquiare, the Orinoco bends to the northwest and flows in great meandering curves to its confluence with the Ventuari River. There the river turns to the west to run between high alluvial banks, its course marked by extensive sandbars.

What type of geographical feature is the Orinoco?

The Orinoco plains, commonly known as Los Ilanos, are lowlands with elevations that never exceed 200 m (656 ft). The Orinoco river is a well known feature of the area and is the most important river in Venezuela. Finally, the Guiana region, which consists of plateaus, makes up over half of the country.