Nouria Newman is the first and only woman to run a 30-metre waterfall, a feat captured in the film Wild Waters which charts some of her most audacious expeditions. After a career on the canoe slalom competition circuit, she left that behind to explore her love of the great outdoors, a passion which has taken her to some of the world's most remote and challenging rivers.

Having heard many times what small, slight women like her weren't expected to do, Darcy Gaechter set out to prove them wrong. Her memoir, Amazon Woman, describes the 4,300-mile long perilous journey she undertook in 2013 from one of the sources of the Amazon to where it meets the Atlantic Ocean.

Produced by Fiona Clampin

(Image: (L) Nouria Newman, credit Getty Images. (R) Darcy Gaechter, credit Matt Power. Background image: East Fork Kaweah River, credit Don Beveridge.)