"An International Space Station astronaut took this photo of the largest estuary in Madagascar, where the iron-rich soils give the water an orange hue.
The delta is a network of distributary channels between larger and smaller “tear-drop” islands. The iron-rich soils color the water in the distributaries a red-orange hue. Several islands appear dark green where forests have colonized the newly deposited land. Today, the delta and neighboring shorelines are home to the largest area of mangrove forests in Madagascar..." - NASA (Click for the rest)