English: The 38-kilometre-long Lago do Erepecu (Lake Erepecu) in Brazil runs parallel to the lower Rio Trombetas (Trombetas River), which snakes along the upper half of this astronaut photograph. Water-bodies in the Amazon Rainforest are often so dark they can be difficult to distinguish. In this image, however, the lake and river stand out from the uniform green of the forest in great detail as a result of sun-glint on the water surface. Sun-glint is the mirror-like reflection of sunlight off of a surface directly back towards the viewer, in this case an astronaut on-board the International Space Station. Forest soil is red, as shown by airfield clearings near Porto Trombetas (image far upper left), a river port on the south side of the Trombetas River. Note: This map is inverted: North is down, east is left