Gavin Hellier / Iguacu Falls, Foz do Igua?u, Iguacu (Iguazu) National Park, Brazil, South AmericaSeptember 2016. Hellier

Nick Garbutt,Nick Garbutt / Tourist watching masses of butterflies drinking from temporary pools. Various species including Large Orange Sulphur (Phoebis agarithe), Cloudless Sulphur (Phoebis sennae), White-angled Sulphur (Anteo...

Nick Garbutt / Iguasu Falls by moonlight, on the Iguasu River, Brazil / Argentina border. Photographed from the Brazilian side of the Falls. State of Parana, Brazil.

Ben Lascelles / Great Dusky Swift (Cypseloides senex) Birds flying past rainbow created by waterfalls, Iguazu National Park, Argentina, October 2008

Ben Lascelles / Iguazu waterfalls, Iguacu National Park, Argentina. October 2008.

Michael Hutchinson / Waterfalls, Iguacu (Iguazu) National Park, Brazil

JIM CLARE / Iguazu Falls, Iguazu National Park, UNESCO World Heritage Centre, Argentina, South America.

Gavin Hellier / Timelapse of Iguazu Falls, Iguazu National Park, Brazil, September 2016. Hellier

Gavin Hellier / Wide angle shot of Iguazu Falls, Iguazu National Park, Brazil, September 2016. Hellier

Gavin Hellier / View of Iguazu Falls, Iguazu National Park, Brazil, September 2016. Hellier

Gavin Hellier / Close-up view of Iguazu Falls, Iguazu National Park, Brazil, September 2016. Hellier

Gavin Hellier / High angle shot looking down on Iguazu Falls, Iguazu National Park, Brazil, September 2016. Hellier