The Rainforest Ecological Train or Waterfalls Train (Tren Ecológico de la Selva or Tren de las Cataratas) is an environmentally friendly, 600 mm (1 ft 11 5⁄8 in) narrow gauge train that runs through the forest inside Iguazú National Park in the north of the province of Misiones of Argentina.
The train can transport up to 150 passengers over 7 kilometres (4.3 mi) of track from the Visitors’ Centre to Cataratas (Waterfalls) Station and Garganta del Diablo (Devil's Gorge) Station. It carries approximately 900,000 visitors yearly.
The train was built in England by Alan Keef Ltd, in Ross-on-Wye, 200 kilometers to the west of London. It is painted green and it consists of a propane locomotive pulling up to five opened roofed carriages with wooden seats at the sides so that the passengers have direct contact with the forest.
The tracks run along the Iguazu River and the train runs at speeds of up to 20 kilometres per hour (12 mph), stopping when animals cross the lines. The journey takes about 20 minutes. From Garganta del Diablo (Devil's Gorge) Station visitors can go to a viewing platform built on the edge of the huge waterfall 90 metres high called Garganta del Diablo.
