Alejandro Chaskielberg is an Argentinean artist who has an amazing eye for photography. A lot of his work looks like it's been manipulated in a tilt-shift style. The NY Times said that his style is like "a fashion photographer shooting culture". Most of the following images are a part of series he did on the Guarani people that live along the river delta.
You can learn more about Alejandro Chaskielberg at his website.